During discovery, the customer outlines data requirements and the anticipated use of Marketing Cloud with the following

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During discovery, the customer outlines data requirements and the anticipated use of Marketing Cloud with the following criteria:✑ Customer data will be fully refreshed every night via Import File Activity from the customer's data warehouse.✑ Contact records will be augmented by relational data tables via Contact Builder.✑ Customer ID will be used as the unique identifier for each contact.Which statement differentiates the use of data extensions over lists?

A. Data extensions are necessary for Contact Builder.
B. Data extensions allow for add/update Import File Activity.
C. Data extensions can store HTML code as an attribute.
D. Data extensions support Customer ID to be used as Subscriber Key.