单项选择题

A.Assign the Mailbox Search management role to Group1, and then create a retention policy.
B.Assign the Mailbox Search management role to Group1, and then create a managed folder mailbox policy.
C.Assign the Mailbox Import Export management role to Group1, and then configure Personal Archivesfor each mailbox.
D.Assign the Mailbox Import Export management role to Group1, and then instruct Group1 to export mailboxes to personal folder (.pst) files.