Explanation:

Reviewing opens and clicks activity summaries is the best action to evaluate journey performance, as it provides information about how subscribers are engaging with the emails sent from the journey. The activity summaries show metrics such as unique opens, unique clicks, unsubscribes, bounces, and complaints for each email activity in the journey. These metrics can help the marketer assess the effectiveness of the email content, design, and timing.

Explanation:

The marketer should go to From Address Management to see a list of all email addresses and domains that are verified for sending1. From Address Management is a feature that allows the marketer to manage, verify, and import email addresses and domains that are used as From addresses in email sends1. The marketer can search, filter, and sort the verified email addresses and domains by status, type, and send ability. The marketer can also add new email addresses or domains, send verification emails, set send able or non sendable addresses, and delete unneeded addresses1.

Send Classifications is not the correct answer, as it does not show a list of all email addresses and domains that are verified for sending. Send Classifications is a feature that allows the marketer to define the settings and attributes of an email send, such as the sender profile, delivery profile, CAN-SPAM classification, andpriority2. The marketer can use send classifications to choose from a list of verified email addresses or specify a custom email address as the From address, but they cannot see or manage all the verified email addresses and domains in send classifications.

Domain SSL Certificates is also not the correct answer, as it does not show a list of all email addresses and domains that are verified for sending. Domain SSL Certificates is a feature that allows the marketer to enable SSL encryption for their custom domains, which can improve their email security and deliverability. The marketer can use domain SSL certificates to apply SSL encryption to their authenticated or private domains that are used as From addresses, but they cannot see or manage all the verified email addresses and domains in domain SSL certificates.

Official Reference:

1: From Address and Domain Verification Checklist - Salesforce
2: Send Classifications - Salesforce : Domain SSL Certificates - Salesforce

Explanation:

List Detective is the correct answer. List Detective is a feature that automatically filters out invalid or problematic email addresses from your sends, such as those with typos, syntax errors, or unsupported domains. List Detective helps improve your deliverability and reputation by preventing bounces and spam complaints from bad email addresses. Bounce Mail Management is a feature that tracks and manages bounced emails based on different bounce categories and thresholds. Auto-Suppression Lists are lists of subscribers who should not receive certain types of emails, such as promotional or transactional emails. You can learn more about these features in the [Email Deliverability] module on Trailhead.

Explanation:

The auto-suppression list is a list of subscribers who should not receive any commercial messages from your account. You can add subscribers to this list manually or automatically based on certain criteria, such as spam complaints. This will prevent the subscriber from receiving further commercial messages from your account.

Explanation:

When sending from a Data Extension in Email Studio, the Split feature lets you apply extra filter logic on-the-fly without creating new Data Extensions or filters. You simply select your primary filtered DE as the audience and then choose Split, defining the additional criteria for this one‐off send. This creates a temporary subset for the send operation only, avoiding DE proliferation and reusability concerns. Copying DEs or filters would add administrative overhead. The Split option is expressly designed to let marketers target a portion of an existing audience seamlessly at send time.