A company has an Exchange Server 2010 environment that includes several shared mailboxes. You need to recommend a solution for enabling multiple users to act as the mailbox owner when sending mail from a shared mailbox.

What should you recommend?

A.
Add the users to the shared mailbox as delegates.

B.
Add the users to a management role group as delegates.

C.
Assign SendAs permissions for the shared mailbox to the users.

D.
Assign FullAccess permissions for the shared mailbox to the users.