Explanation:

✅ Event Notification Service (ENS)
The Event Notification Service (ENS) is the correct method because it provides real-time notifications about email events such as Sent, NotSent, Bounce, Open, and Click. In this scenario, the analytics team needs immediate visibility into transactional email delivery metrics to ensure compliance with legal obligations. ENS allows external systems to subscribe to these events and receive updates instantly, making it the only option that satisfies the requirement for real-time monitoring. This ensures that any delivery issues are detected immediately and corrective actions can be taken without delay.

❌ Incorrect Answer: Platform Events API
The Platform Events API is primarily used within Salesforce CRM for publishing and subscribing to custom events across Salesforce applications. While powerful for orchestrating business processes, it is not designed to provide Marketing Cloud email delivery metrics. It lacks the direct integration with Marketing Cloud’s transactional email tracking, so it cannot fulfill the requirement for real-time Sent/NotSent updates.

❌ Incorrect Answer: Data View Export with Every Send
Data Views in Marketing Cloud provide tracking data such as sends, opens, and clicks, but they are batch-oriented and updated with latency. Exporting Data Views after every send would not provide real-time visibility, and the process would be inefficient and prone to delays. This makes them unsuitable for legal compliance scenarios where immediate confirmation of delivery status is required.

❌ Incorrect Answer: Data Retrieves on the Send Object
Data Retrieves on the Send Object allow querying of send data, but similar to Data Views, they are not real-time. They are useful for reporting and historical analysis but cannot provide instantaneous updates on transactional email delivery. Therefore, they fail to meet the requirement for real-time monitoring.

📖 References
Salesforce Help: Event Notification Service Overview
Trailhead Module: Marketing Cloud Event Notification Service

Explanation:

The scenario requires a recurring, automated campaign managed by a non-technical, non-admin marketing user. The data (expiration date) is already available. Let's break down why these three components are the ideal solution:
D. Automation Studio:
This is the core automation engine. An automation can be scheduled to run daily (or weekly) to:
Use the Data Filter to find the target audiences.
Execute the email send.
This fulfills the requirement for an automated campaign that checks for subscribers whose expiration is in exactly 7 or 15 days on any given day.
A. Data Filter:
Data Filters are the perfect tool for a non-technical user to segment data based on a date field. The marketing user can easily create and maintain two filters:
Filter 1: ExpirationDate Equals Today + 7 Days
Filter 2: ExpirationDate Equals Today + 15 Days
These filters are dynamic and will automatically update each day the automation runs, finding the correct audience without manual intervention.
B. Template-Based Emails:
Templates are designed for business users. An administrator or developer can create a pre-formatted, locked-down email template with placeholders for dynamic content (like the subscriber's name or exact expiration date). The marketing user can then create emails based on this template, ensuring brand compliance without needing HTML skills or the ability to alter critical structural elements.

Why the Other Options are Incorrect
C. Suppression List:
A suppression list is used to exclude people who should not receive emails (e.g., unsubscribed, complained). While a best practice for any send, it is not a core component of the solution for building the audience or executing the send itself. It is a complementary feature, not one of the three primary components needed here.
E. Triggered Send:
A triggered send is for sending a single email in real-time based on an API call or an event (e.g., an abandoned cart, a welcome email after signup). It is not the right tool for a recurring batch campaign that needs to query a data extension daily to find a new audience. An Automation with a Scheduled Send is the correct pattern for this use case.

Reference
Salesforce Help Documentation:
"Automation Studio": Describes how to automate marketing processes.
"Create a Data Filter": Explains how to use filters for audience segmentation.
"Email Templates": Details how templates empower business users to create emails easily.
Exam Guide Domain: Journey Builder and Automation - This tests the knowledge of selecting the right automation tool (Automation Studio vs. Journey Builder) for a given business scenario. This is a classic Automation Studio batch use case.

Explanation:

This is the only officially supported, reliable, and scalable method to pass contacts from Journey A to Journey B based on actual email engagement (opens or clicks).

why A is correct and how it works in practice:

In Journey A, you place an Engagement Split right after the Email Send activity.
You configure it (for example: “Opened OR Clicked within 7 days”).
Every Engagement Split automatically creates boolean fields in the _JourneyActivity system data view.
The field name follows this pattern:
ActivityInstanceID_Engaged__c = true/false
(or sometimes ActivityName_Engaged__c = true/false depending on version).
In Automation Studio, you create a daily (or more frequent) SQL Query Activity that looks for contacts where that boolean field just turned to true and who have not yet entered Journey B.
Example simplified SQL:

SELECT
j.SubscriberKey,
j.EventDate
FROM _JourneyActivity j
INNER JOIN _Journey v ON j.VersionID = v.VersionID
WHERE v.JourneyName = 'Journey A – Welcome Series'
AND j.ActivityName = 'Welcome Email 2'
AND j.Engaged__c = 1
AND j.SubscriberKey NOT IN (SELECT SubscriberKey FROM JourneyB_AlreadyEntered_DE)

The result of that query is written to a Data Extension that is configured as the Entry Source for Journey B (usually set to re-entry anytime or re-entry after X days).
This pattern is explicitly documented and taught by Salesforce in the Marketing Cloud Consultant certification, Journey Builder Advanced classes, and multiple Trailhead modules.

Why B, C, and D are incorrect
B – There is no data view called “Journey System data view” for direct engagement tracking. The correct one is _JourneyActivity. Also, there is no direct “activity engagement” field on the base journey views that reliably captures opens/clicks.
C – There is no such thing as a “Verification Activity” in Automation Studio. That activity does not exist.
D – There is no “Contact Activity” that can write a boolean to a Data Extension directly from an Engagement Split. Contact Configuration activities can update Data Extensions, but they cannot capture the outcome of an Engagement Split.

References
Journey Activity Data View (official fields, including Engagement Split booleans):
Using Engagement Splits to Trigger Downstream Journeys (Salesforce-recommended pattern):
Trailhead – “Advanced Journey Builder” module
Consultant Certification Study Guide – Journey Builder section explicitly mentions querying _JourneyActivity for split outcomes

Explanation:

To enable auto-reply messages in Salesforce Marketing Cloud for NTO’s scenario:
Navigate to Email Studio > Admin > Reply Mail Management.
In the Automated Response Email for Remaining Replies section, select the “Create Custom Response” option.
Use the “Define Email” link to select the pre-defined HTML email (stored in Content Builder) that contains the message about replies being unmonitored and directing subscribers to call NTO.
This configuration ensures that any replies to emails sent from Content Builder or Journey Builder trigger the custom HTML email as an auto-reply, meeting NTO’s requirements.
This setup works at the account or business unit level (depending on whether SAP is configured) and applies to all emails sent from the specified business unit, including those from Content Builder and Journey Builder.

Why not B?
Triggered Sends are not used for Reply Mail Management auto-replies. The RMM settings allow you to select a pre-defined email from Content Builder, not a Triggered Send.
Why not C?
Sender Profiles do not have options for configuring auto-replies with Triggered Sends or the settings mentioned. Auto-reply configuration is handled in Reply Mail Management, not Sender Profiles.
Why not D?
There is no “Admin & Account Setting” page or “Auto Reply Email” section for pasting HTML code. Auto-replies use pre-defined emails from Content Builder, configured via Reply Mail Management.

Reference:
Salesforce Help: Reply Mail Management Overview
Explains how to configure Reply Mail Management, including setting up custom auto-reply emails.
Salesforce Help: Configure Automated Response Email

Details the process of selecting a custom email for auto-replies in the Reply Mail Management settings.

Explanation:

Here’s why this sequence works best:

Random Split
Splits contacts into 3 paths (e.g., Version A, B, C)
Perfect for A/B/n testing different creative versions.

Send email
Each path sends its own creative version of the test email.

Wait
Gives subscribers time to open/click (e.g., 2–3 days) so engagement can be measured.

Engagement Split
On each path, checks if the contact engaged (opened/clicked) with that specific test email.
You can branch to:
Engaged
Not Engaged

Join
Recombines the “Not Engaged” branches from each path back into a single flow.

Send email
Sends a follow-up email only to those who did not engage with any of the test versions.

Why the others don’t fit

A: Engagement Split happens before sending an email – impossible to evaluate engagement.
B: Uses Decision Split instead of Engagement Split, and the order (Join → Decision → Wait) doesn’t support engagement-based logic.
D: No Random Split, so there’s no way to compare three creative versions.

So the only sequence that both tests 3 creatives and then targets non-engagers is option C.