Explanation:

In Salesforce Marketing Cloud Account Engagement (MCAE, formerly Pardot), the only required field when creating a prospect is Email. This is because the email address serves as the unique identifier for a prospect in the system, ensuring that each prospect record is distinct and can be tracked for marketing activities. Without an email address, a prospect cannot be created, as it is essential for communication and tracking engagement.

Why not B (Company)?
The Company field is not required. It is useful for segmentation and reporting but can be left blank when creating a prospect.
Why not C (CD Campaign)?
The Campaign field (likely meant by "CD Campaign") is optional. It associates a prospect with a marketing campaign for tracking purposes, but it is not mandatory during prospect creation.
Why not D (Profile)?
The Profile field, which determines criteria for grading prospects, is not required. It can be assigned later or left unset.
Why not E (Score)?
The Score field, which tracks prospect engagement, is automatically set to 0 for new prospects and cannot be manually set during creation, making it non-required.
Why not F (Grade)?
The Grade field, which reflects how well a prospect matches the ideal customer profile, is optional and defaults to D until grading criteria are applied.
Why not G (Assign To)?
The Assign To field, which assigns a prospect to a user or group, is optional. Prospects can remain unassigned or be assigned later via automation or manual action.

Reference:
Salesforce Help Documentation: Creating Prospects in Marketing Cloud Account Engagement
Confirms that the email address is the only mandatory field when creating a prospect manually or via import.
Trailhead Module: Marketing Cloud Account Engagement Prospect Management
Explains prospect creation and management, highlighting the email field as the unique identifier.

Explanation:

Salesforce Marketing Cloud Account Engagement (MCAE), formerly known as Pardot, provides a native connector specifically for the video hosting platform Wistia.
Wistia Connector Functionality: When the Wistia connector is enabled, it allows MCAE to track detailed prospect engagement with Wistia-hosted videos (like play, pause, rewind, and percentage watched). This activity is recorded on the prospect record and can be used to drive marketing automation, such as:

Scoring leads based on video consumption (e.g., higher score for watching 75% or more).
Segmenting prospects into lists or programs based on what they watched.
Triggering actions in Engagement Studio (e.g., sending a follow-up email after a specific video is watched).

The other options are video platforms that do not offer a native, out-of-the-box connector to track detailed viewing activity within Marketing Cloud Account Engagement for the purpose of scoring and automation.

Incorrect Answers
A. YouTube
Incorrect. YouTube is primarily a video sharing platform and does not offer a native connector for MCAE to track detailed prospect viewing data on an individual level (percentage watched, heatmaps, etc.) for scoring and segmentation.
C. Vimeo
Incorrect. Vimeo is a popular video hosting platform, but it does not have a native, out-of-the-box connector for MCAE/Pardot to track individual prospect viewing data for automation. Integrations for Vimeo would require a custom setup (like External Activities or a third-party app).
D. Dailymotion
Incorrect. Dailymotion is a video sharing site and does not offer a native connector for MCAE to track detailed prospect viewing data for scoring and automation.

References
Salesforce Help Documentation: The official documentation lists the pre-built connectors available in Marketing Cloud Account Engagement.
Search for "Add the Wistia Connector" in the Salesforce Marketing Cloud Account Engagement Help documentation. The steps detail how to enable the Wistia connector under "Connectors," confirming its status as a native integration.
The Wistia connector is explicitly grouped under the category of "Video Connectors."

Explanation:

Engagement Studio processes steps in two primary ways:
Real-time Steps: Actions like "Send an Email," "Add to List," or "Apply a Tag" are executed immediately when a prospect enters them.
Timed Steps: The "Wait" step is a timed step. The clock for a wait step only "ticks" while the Engagement Program is active.
When you pause an entire Engagement Program, you are halting all timed logic. A prospect stuck in a 7-day wait step will not have those days counted down while the program is paused. The timer is effectively frozen.
Once the program is resumed, the timer for the wait step unfreezes and continues from the point it was paused. For example, if a prospect had 3 days remaining on their wait step when the program was paused, they will still have 3 days left to wait once the program is resumed.

Why the Other Options are Incorrect:
B. & D. (They will continue through the wait step...):
These are incorrect because the progression through a wait step is not a background process that completes independently. It is an active state within the program that is suspended when the program itself is paused.
C. (They will start the wait step from the beginning):
This is incorrect because the system retains the state of each prospect in the program. Resetting the wait step for every prospect would be inefficient and could lead to unintended consequences, such as making prospects wait longer than originally intended.

Source:
This behavior is defined by the core architecture of Engagement Studio. The official Salesforce Pardot Help documentation on pausing programs implies this functionality by stating that pausing a program stops prospects from moving through it. The key concept is the distinction between real-time actions and timed actions, and that pausing affects the execution of timed logic.
Salesforce Help Article: "Pause or Stop an Engagement Program" (The description of pausing aligns with the behavior described in option A).

Explanation:

Why D is correct (what to configure):

Salesforce / Account Engagement setup
In Marketing Setup → Marketing App Extensions, create an extension for the 3rd-party webinar tool and add an Activity Type for “Webinar Registration.” Mark it Active in Automations so it’s usable in Engagement Studio.
Have the webinar platform post registrations to Account Engagement as External Activities via the extension (this makes the activity appear on the prospect and available to automation, segmentation, and Engagement Studio).
Engagement Studio
In your program, add a Trigger → External Activity step like “Prospect has External Activity: Webinar Registration” to split the path and send different emails to “Registered” vs “Not Registered.” External Activity data is supported in Engagement Studio triggers. Salesforce

Why the other options are wrong:
A. “Build a custom connector…use a custom trigger in Engagement Studio” → Engagement Studio doesn’t support arbitrary “custom triggers,” and “custom connectors” aren’t the extensibility model here; Marketing App Extensions + External Activities/Actions are the supported approach.
B. “Prospect Webinar trigger” → There isn’t a generic “webinar” trigger for any 3rd-party tool. You need to surface the event as an External Activity to use it in a trigger.
C. Manual export/import isn’t an automated or near-real-time solution and won’t let Engagement Studio listen for the registration event; it also risks timing issues with triggers (which only evaluate events during their wait window).

References
Salesforce Help: How Marketing App Extensions Work (External Activities are usable in Engagement Studio).
Salesforce Help: Considerations for Using External Activity (available in automation, segmentation, and Engagement Studio; requirements).
Salesforce Help: Create a Marketing App Extension (steps to create the extension and activity types).
Salesforce Help: Engagement Studio triggers evaluate activity only while the program is running (timing caveat).

Explanation:

A. Assign prospects to an existing user:
When importing prospects via a CSV file, you can include a column that specifies the email address or username of the Account Engagement user to whom each prospect should be assigned. This is useful for distributing new leads to the appropriate sales team members. D. Undelete matching prospects from the Recycle Bin:
During the import process, you have an option to "Un-delete matching prospects found in the recycle bin during this import". This feature allows you to restore previously deleted prospects whose email addresses or Salesforce IDs match a record in your import file.

Why the other options are incorrect

B. Create new custom fields and populate field values:
You cannot create new custom fields directly within the prospect import wizard. Custom fields must be pre-configured in Account Engagement under Account Engagement Settings > Object and Field Configuration before they can be mapped during the import process.
C. Permanently delete prospects:
The import process does not offer the ability to permanently delete prospects. Deleting prospects moves them to the recycle bin. Permanently deleting prospects is a separate, manual action performed from the recycle bin.