Your company has an Exchange organization. All servers in the organization have Exchange
Server 2010 Service Pack 1 (SP1) installed.
The network contains an internal root certification authority (CA).
You plan to add a disclaimer to all of the e-mail messages sent by users in the company.
You need to ensure that the disclaimer can be added to encrypted e-mail messages.
What should you do?

A.
Modify the priority of the Transport Rule agent on all of the Hub Transport servers.

B.
Instruct users to encrypt e-mail messages by using S/MIME only.

C.
Instruct users to encrypt e-mail messages by using IRM only.

D.
Enable the Content Filter agent on all of the Hub Transport servers.