You have an Exchange Server 2010 organization that contains a mailbox database named DB1.You have a backup of DB1.You need to copy a mailbox from the backup to a personal folder （PST） file.The solution must not prevent users on DB1 from accessing their mailboxes.What should you do？（）

• A、Restore the mailbox database to DB1 and then run the Move-Mailbox cmdlet.
• B、Restore the mailbox database to DB1 and then restore the mailbox.Run the New- MoveRequest cmdlet.
• C、Restore the mailbox database to a Recovery Mailbox database and then run the Connect- Mailbox cmdlet.
• D、Restore the mailbox database to a Recovery Mailbox database and then restore the mailbox.Run the Export-Mailbox cmdlet.