What is a true statement about the email send behavior for any subscriber who currently does NOT exist in All Subscribers?

A marketer sends an email to a sendable data extension that contains a Customer_ID field with a numeric data type that relates to the Subscriber Key in All Subscribers as a Send Relationship.

What is a true statement about the email send behavior for any subscriber who currently does NOT exist in All Subscribers? (Choose 2)
A . The Primary Key and demographic data will be added to All Subscribers
B. The subscriber will be added to All Subscribers with a status of Active
C. The email send will fail
D. The email address and Subscriber Key will be added to All Subscribers

Answer: B,D