What contributes to these unsubscribe reasons?

Northern Trail Outfitters (NTO) notices that some of its unsubscribe reasons are related to Reply Mail Management (RMM). NTO does not have RMM in its account.

What contributes to these unsubscribe reasons?
A . List Unsubscribe header
B . Profile Center Unsubscribe
C . Universal Unsubscribe

Answer: B