You are decommissioning one of the domain controllers in a child domain.
You need to transfer all domain operations master roleswithin the child domain to a newly installed
domain controller in the same child domain.
Which three domain operations master roles should you transfer?
(Each correct answer presents part of the solution.Choose three.)

A.
RID master

B.
PDC emulator

C.
Schema master

D.
Infrastructure master

E.
Domain naming master

Explanation:
http://technet.microsoft.com/en-us/library/cc781578%28v=ws.10%29.aspx
Transferring operations master roles
Transferring an operations master role means movingit from one domain controller to another with the
cooperation of the original role holder. Depending upon the operations master role to be transferred, you
perform the role transfer using one of the three Active Directory consoles in Microsoft Management Console
(MMC).