Your company has a single Active Directory directory service forest with multiple domains. The Schema FSMO role is held by one of the domain controllers in the forest root domain. The Domain Naming Master FSMO role is held by one of the domain controllers in a child domain. All domain controllers have Windows Server 2003 installed. You need to upgrade all domain controllers to Windows Server 2003 R2. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
Run the adprep /forestprep command in the forest root domain.

B.
Run the adprep /forestprep command in all the child domains.

C.
Run the adprep /domainprep command in all the child domains only.

D.
Run the adprep /domainprep command in all domains.