Your network contains a single Active Directory domain. The domain contains five read-only  domain controllers (RODCs) and five writable domain controllers. All servers run Windows Server  2008. You plan to install a new RODC that runs Windows Server 2008 R2.    <br /> You need to ensure that you can add the new RODC to the domain. You want to achieve this  goal by using the minimum amount of administrative effort.    <br /> Which two actions should you perform()
A、At the command prompt, run adprep.exe /rodcprep.
B、At the command prompt, run adprep.exe /forestprep.
C、At the command prompt, run adprep.exe /domainprep.
D、From Active Directory Domains and Trusts, raise the functional level of the domain.
E、From Active Directory Users and Computers, pre-stage the RODC computer account.