单项选择题

A.Raise the functional level of the forest to Windows Server 2008 R2.
B.Modify the path of the SYSVOL folder on all of the domain controllers.
C.On a global catalog server, run repadmin.exe and specify the KCC parameter.
D.On the domain controller that holds the primary domain controller (PDC) emulator FSMO role, run dfsrmig.exe.