If an engagement studio program is enabled to repeat, the prospects are eligible to repeat after one day and can repeat three times, and a prospect remains on the program recipient list, then the prospect will start the program over at the beginning after waiting one day (A). This is how repeating engagement programs work in Account Engagement. The prospect will not be prevented from restarting the program (B, D) unless they have reached the maximum number of repeats, which is three in this case. The prospect will also not restart the program immediately , but after the specified number of days, which is one in this case. Reference: Repeating Engagement Studio Flows Introduction

The three activities that can increase or decrease a score in the baseline scoring system are unsubscribed from email, webinar attended, and form submission. A score is a numerical value that indicates the level of interest or engagement of a prospect in your products or services. You can use scoring rules to assign positive or negative points to prospects based on their activities, such as opening an email, clicking a link, or filling out a form. You can also use scoring categories to assign points based on specific products, services, or business units. The baseline scoring system is the default set of scoring rules that Marketing Cloud Account Engagement provides, and you can customize it to suit your needs. The baseline scoring system assigns points to the following activities:
Unsubscribed from email: -100 points. This indicates that the prospect is not interested in receiving your emails, and reduces their score significantly.
Webinar attended: +50 points. This indicates that the prospect is interested in learning more about your products or services, and increases their score considerably.
Form submission: +50 points. This indicates that the prospect is willing to share their information with you, and increases their score considerably.
Other activities that can affect the score in the baseline scoring system are:
Landing page error: -10 points. This indicates that the prospect encountered a problem with your landing page, and reduces their score slightly.
Assigned to a user: +15 points. This indicates that the prospect is ready to be contacted by a salesperson, and increases their score moderately.
Email open: +1 point. This indicates that the prospect opened your email, and increases their score slightly.
Email click: +3 points. This indicates that the prospect clicked on a link in your email, and increases their score slightly.
Email hard bounce: -10 points. This indicates that your email could not be delivered to the prospect, and reduces their score slightly.
Email soft bounce: -5 points. This indicates that your email was temporarily rejected by the prospect's email server, and reduces their score slightl

According to the Salesforce documentation, the two capabilities that are true for completion actions are: C) Completion actions cannot be applied directly on a landing page, and D) Completion actions do not execute on image file downloads. A completion action is an automation tool that can be used to perform an action after a prospect successfully completes a marketing element, such as clicking a link in an email, submitting a form, or visiting a web page. A completion action can be used to perform actions such as adding a prospect to a list, assigning a prospect to a user, sending an autoresponder email, or adjusting a prospect's score. Completion actions cannot be applied directly on a landing page, as landing pages do not have completion actions. However, completion actions can be applied on the forms or custom redirects that are embedded on the landing page. Completion actions do not execute on image file downloads, as image file downloads are not considered as completion events. However, completion actions can be executed on other types of file downloads, such as PDFs or Word documents. Completion actions are not applied retroactively, as they are only applied to prospects who complete the marketing element after the completion action is created. Completion actions do not apply to both visitors and prospects, as they only apply to prospects who have been identified by their email address or their Marketing Cloud Account Engagement tracking cookie. Reference: Salesforce documentation

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. Reference: Marketing Cloud Account Engagement Landing Page Reports

According to the Salesforce documentation, the asset that needs to be created first in order for a user to send a prospect a one-to-one email is an email template. A one-to-one email is an email that is sent to an individual prospect, such as a follow-up or a confirmation email. A one-to-one email can be sent from the prospect record, a list, a report, or a campaign. To send a one-to-one email, the user needs to have an email template that defines the content and layout of the email. An email template can be created in Email Studio or Content Builder, and it can be personalized with variable tags or dynamic content. An autoresponder, an engagement studio program email, or a list email are not assets that need to be created first in order for a user to send a prospect a one-to-one email, as they are related to other types of email sends, such as automated responses, program emails, or mass emails. Reference: Salesforce documentation