Refer to the exhibit.

The system administrator of mydomain.com received complaints that some messages that were sent
from sender user@somedomain.com were delayed. Message tracking data on the sender shows that an
email sample that was received was clean and properly delivered. What is the likely cause of the
intermittent delays?

A.
The remote MTA has a SenderBase Reputation Score of -1.0.

B.
The remote MTA is sending emails from RFC 1918 IP addresses.

C.
The remote MTA has activated the SUSPECTLIST sender group.

D.
The remote MTA has activated the default inbound mail policy.