You plan to deploy Microsoft Forefront Online Protection for Exchange (FOPE). You need to recommend changes to the environment to ensure that inbound email messages from the Internet are scanned by FOPE.

What should you include in the recommendation?

A.
Modify the mail exchange (MX) records of A. Datum to point to FOPE.

B.
Modify the sender policy framework (SPF) record of A. Datum to point to FOPE.

C.
Implement Microsoft Forefront Threat Management Gateway (TMG), and then create a sharing policy.

D.
Implement Microsoft Forefront Threat Management Gateway (TMG), and then create a federation trust.

E.
Implement Forefront Protection 2010 for Exchange Server, and then create an organization relationship.