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