A.Create two SRV records.Assign the SRV record for Server1 a priority of 20.Assign the SRV record Server2 a priority of 10.
B.Create two SRV records.Assign the SRV record for Server1 a priority of 10.Assign the SRV record for Server2 a priority of 20.
C.Create two MX records.Assign the MX record for Server1 a priority of 20.Assign the MX record for Server2 a priority of 10.
D.Create two MX records.Assign the MX record for Server1 a priority of 10.Assign the MX record for Server2 a priority of 20.

A.From the Exchange Management Shell， run the Set-Mailbox cmdlet
B.From the Exchange Management Shell， run the Set-MailboxDatabase cmdlet
C.From the Exchange Management Console （EMC）， modify the properties of each mailbox database
D.From the Exchange Management Console （EMC）， modify the properties of each Client Access server object