Your company has an Active Directory forest that contains only Windows Server 2003 domain controllers. You need to prepare the Active Directory domain to install Windows Server 2008 domain controllers. Which two tasks should you perform（）

• A、Run the adprep /forestprep command.
• B、Run the adprep /domainprep command.
• C、Raise the forest functional level to Windows Server 2008.
• D、Raise the domain functional level to Windows Server 2008.