Which two domain operations master roles should you transfer?

You are decommissioning a child domain. The child domain contains five operations master
roles.
You need to transfer the forest operations master roles to a newly installed domain controller
in a different child domain.
Which two domain operations master roles should you transfer? (Each correct answer
presents part of the solution. Choose two.)

A.
RID master
B.PDC emulator
C.Schema master
D.Domain naming master
E.Infrastructure master

Explanation:
Forestwide Operations Master Roles
The schema master and domain naming master are forestwide roles, meaning that there is
only one schema master and one domain naming master in the entire forest.
Note:
* Operations Master Roles
The five operations master roles are assigned automatically when the first domain controller
in a given domain is created. Two forest-level roles are assigned to the first domain
controller created in a forest and three domain-level roles are assigned to the first domain
controller created in a domain.
* The five FSMO roles [in Windows 2003] are:
Schema master – Forest-wide and one per forest.
Domain naming master – Forest-wide and one per forest.
RID master – Domain-specific and one for each domain.
PDC – PDC Emulator is domain-specific and one for each domain.
Infrastructure master – Domain-specific and one for each domain.