Q30 Multiple choice Mark for later What is a true statement about Subscriber Key? (Choose 3) Select all that apply. A Subscriber Key allows an email address to appear multiple times in a list or All Subscribers when populated with a value other than an email address B Subscriber Key is mapped to a field in a sendable data extension when defining a Send Relationship C Subscriber Key and Primary Key are interchangeable terms D Subscriber Key is a unique identifier for a subscriber, and can be populated with an email address or another unique value E Subscriber Key determines what update types will be available when importing data Correct answer