You deploy Microsoft Exchange Server 2007. You need to ensure that users are able to access their e-mail by using POP3. What should you do?

A.
Disable the IMAP4 Mailbox Feature setting.

B.
Modify the Retrieval Settings for POP3 in the Exchange Management Console.

C.
Modify the Connection settings in the Exchange Management Console.

D.
Configure the POP3 service Startup type to be Automatic, and start the POP3 service.