How can they determine which subscribers reported their email as spam so they can flag those records in their customer service database?

A daily deal website is concerned with their sender reputation and needs consistent visibility into subscribers who report their email as spam.

How can they determine which subscribers reported their email as spam so they can flag those records in their customer service database?
A . An automation that queries the Complaint data view.
B . An automation that queries the Unsubscribe data view.
C . An automation that generates the Complaint Tracking Extract.
D . An automation that generates the Unsubscribe Event Extract.

Answer: A