You have an Exchange Server 2010 organization. The organization contains a distribution group named Group1.

You need to ensure that a user named User1 can review and approve all messages sent to Group1.

You must prevent User1 from modifying the membership of Group1.

What should you do?

A.
Add User1 to Group1’s Managed by list.

B.
Assign User1 as a group moderator for Group1.

C.
Assign the Message Tracking management role to User1.

D.
Add User1 to Group1 and then create a new journal rule.