問題文
A developer creates a data extension that an email send will use as its audience. The send fails validation because the audience cannot be resolved to recipients. Which configuration step resolves this?
選択肢
- Add a retention setting to the data extension and relate that period to the send classification that the account uses for outbound mail.
- Add a primary key to the data extension and relate that key to the folder category value that the account uses to group its assets.
- Mark the data extension as testable and relate one of its columns to the tracking identifier column that the account uses to record opens.
- Mark the data extension as sendable and relate one of its columns to the subscriber key attribute that the account uses to identify recipients.