You are a messaging professional. Your company uses a Microsoft Exchange Server 2007 messaging system.

Your network infrastructure is as shown in the following exhibit.

The messaging administrators in each office manage and maintain the Mailbox server at their respective office.

You need to design a recovery plan that allows messaging administrators in each office to recover mailboxes and deleted e-mail messages.

Which permission assignments should you include in the plan?

A.
Add each administrators account to the Exchange Server Administrators group in the respective domain and the local Administrators group on the respective mailbox server.

B.
Add each administrators account to the Exchange Server Administrators group in the respective domain and the Backup Operators group on the respective mailbox server.

C.
Add each administrators account to the Exchange Server Administrators group in the forest root domain and the Backup Operators group on the respective mailbox server.

D.
Add each administrators account to the Exchange Server Administrators group in the respective domain and the Backup Operators group on a domain controller on the respective domain.