Your network consists of a single Active Directory domain. All domain controllers run Windows Server 2003. You upgrade all domain controllers to Windows Server 2008. You need to ensure that the Sysvol share replicates by using DFS Replication （DFS-R）. What should you do（）
- AFrom the command prompt， run netdom /reset.
- BFrom the command prompt， run dfsutil /addroot.sysvol.
- CRaise the functional level of the domain to Windows Server 2008.
- DFrom the command prompt， run dcpromo /unattend：unattendfile.xml