What feature should a consultant include in the solution?

During discovery a consultant confirmed:

*A master audience file containing contact information and data points will be used for segmentation and imported nightly.

*The customer would like to implement a mechanism that consistently prevents sending promotional emails to subscribers who work for their top three competitors.

What feature should a consultant include in the solution?
A . A global unsubscribe
B. An auto-exclusion list
C. An auto-suppression list
D. An exclusion list

Answer: C