You have an Exchange Server 2010 organization. You need to recommend a solution that prevents the permanent deletion of e-mail messages from the mailboxes of employee who have been dismissed from the company.

What should you recommend?

A.
Implement managed folders.

B.
Implement a legal hold for each mailbox.

C.
Implement a Retention Policy for each mailbox.

D.
Implement an Outlook Protection Rule for each mailbox.