Your network contains Mailbox servers that run Exchange Server 2007 and Exchange Server 2010.You need to ensure that all e-mail messages located in the Inbox folders of all users are deleted after 120 days.What should you create first？（）

A.a linked mailbox
B.a managed custom folder
C.a message classification
D.an Outlook Protection Rule

A.Create a managed custom folder.Create a transport rule
B.Create a new mail folder by using Microsoft Office Outlook.Create a journal rule
C.Create a managed custom folder.Run the Managed Content Settings wizard from the Inbox managed default folder
D.Create a new mail folder by using Microsoft Office Outlook.Run the Managed Content Settings wizard from the Inbox managed default folder

A.Remove MBX1 from DAG1.
B.Remove all mailbox database copies from DAG1.
C.Remove the computer account for MBX1 from Active Directory.
D.Run the Clean-MailboxDatabase cmdlet on all other members of DAG1 except MBX1.