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 DomainThe safer ， easier way to help you pass any IT exams. 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？（）

• 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.