Your network contains 

Your network contains an Active Directory domain. All domain controllers run Windows Server  2008. The functional level of the domain is Windows Server 2003. All client computers run  Windows 7.   You install Windows Server 2008 R2 on a server named Server1. You need to perform an offline  domain join of Server1.     Which two actions should you perform（）

• AFrom Server1， run djoin.exe.
• BFrom Server1， run netdom.exe.
• CFrom a Windows 7 computer， run djoin.exe.
• DUpgrade one domain controller to Windows Server 2008 R2.
• ERaise the functional level of the domain to Windows Server 2008.