How do you synchronize a primary and secondary MDS from the Multi-domain GUI?

How do you synchronize a primary and secondary MDS from the Multi-domain GUI?

A.
You cannot syncchronize primary and secondary MDS’s from the MDG

B.
Launch SmartUpdate, right-click on the secondary MDS and choose Synchronize

C.
Select High Availability from the MDS Contents view, right-click on the secondary MDS (if not
active) and choose Synchronize

D.
Select High Availability from the Customer Contents view, right-click on any MDS, choose
Synchronize

Explanation: