The two characteristics that must be true of the list that the prospect can view and opt out of on the Marketing Cloud Account Engagement Email Preference Center are that it is a Static List and that it is a CRM Visible List. A Static List is a list that is manually populated by the marketer or the prospect. A prospect can opt out of a Static List by clicking on the unsubscribe link in an email or by visiting the Email Preference Center and deselecting the list. A CRM Visible List is a list that is synced with a Salesforce campaign and can be viewed and reported on in Salesforce. A prospect can be removed from a CRM Visible List if they no longer meet the criteria of the Salesforce campaign, such as having a certain score or status. Option B is not correct because a Dynamic List is a list that is automatically populated by Marketing Cloud Account Engagement based on criteria that match prospect fields. A prospect cannot opt out of a Dynamic List, but they can be removed from the list if they no longer meet the criteria. Option D is not correct because a Public List is a list that is visible on the Email Preference Center and can be opted in or out by the prospect. A Public List can be either a Static List or a Dynamic List, but it is not a characteristic that affects the prospect’s removal from the list. References: Marketing Cloud Account Engagement Email Preference Center Best Practices - Salesforce Ben, Create a Custom Email Preference Center Page - Salesforce, Crafting Clear Marketing Communication with Marketing Cloud Account Engagement Email Preference Centers