A.This can be accomplished by running the Update-MailboxDatabaseCopy cmdlet from the Exchange Management Shell.
B.This can be accomplished by running the Add Mailbox Database Copy wizard from the Exchange Management Console.
C.This can be accomplished by running the Restore-DatabaseAvailabilityGroup cmdlet from the Exchange Management Shell.
D.This can be accomplished by restarting the Microsoft Exchange Replication Service from the Services console.