Explanation
When a user creates and resumes a new automation rule, the rule will continuously look for prospects who match the criteria (B) and evaluate their entire prospect database for matches. These are the characteristics of automation rules in Account Engagement, which are different from segmentation rules that run only once.
The rule will not run once and must be re-run for prospects to match again (A), nor will it unmatch prospects that no longer match the criteria (D). Unmatching prospects is only possible with dynamic lists, not automation rules. References: Using Account Engagement Automation Rules vs. Salesforce Flows

Explanation
According to the Salesforce documentation, the answer is true. Administrators can reset passwords for users.
An administrator is a user who has the highest level of permissions and access in Marketing Cloud Account Engagement, and who can create and manage other users, roles, and settings. An administrator can reset passwords for users in the Admin tab in Marketing Cloud Account Engagement, and they can use different methods, such as:
* Reset password for a single user: An administrator can reset the password for a single user by accessing the user record in the User List, and clicking on the Reset Password button. The administrator can then enter a new password for the user, or generate a random password. The administrator can also choose to send an email notification to the user with the new password.
* Reset password for multiple users: An administrator can reset the password for multiple users by selecting the users from the User List, and clicking on the Reset Password option in the table actions.
The administrator can then enter a new password for the users, or generate a random password. The administrator can also choose to send an email notification to the users with the new password.
References: Salesforce documentation

Explanation
If a Marketing Cloud Account Engagement administrator wants to know how many unique submissions they have for a form on a landing page, they should check the landing page report. The landing page report shows the performance metrics of a landing page, such as views, submissions, conversion rate, and cost per submission. The landing page report also shows the number of unique submissions, which is the number of prospects who submitted the form for the first time. The landing page report can be accessed from the landing page table or from the landing page details page6. References: Marketing Cloud Account Engagement Landing Page Reports

Explanation
Emails are electronic messages that you can send to prospects and customers to communicate with them and engage them with your marketing content. You can create and send emails using Marketing Cloud Account Engagement. However, some emails may get stuck in spam, which means that they are filtered out by the recipient's email provider or client and marked as unsolicited or unwanted messages. To avoid this, you can create a text version of the email, which is a plain text alternative to the HTML version of the email. A text version of the email helps with email deliverability and accessibility, as some email clients or devices may not support HTML or images. Creating clear calls-to-action, mobile-friendly versions, or domain keys and SPF may also help with email deliverability, but they are not as essential as creating a text version of the email.
Removing the unsubscribe link from the email is not a good practice, as it may violate the email regulations and preferences of the recipients. References: Emails, [Create a Text Version of an Email]

Explanation
If a new Lead record is created in Salesforce without an email address and the Salesforce connector is set to
"automatically create prospects in Marketing Cloud Account Engagement", no new prospect will be created in Marketing Cloud Account Engagement. This is because email address is a required field for creating a prospect in Marketing Cloud Account Engagement, and without it, the sync will fail. The Lead record will remain in Salesforce, but it will not have a corresponding prospect in Marketing Cloud Account Engagement1.
References: Marketing Cloud Account Engagement Sync Behavior