Your company has a single-domain Active Directory forest. The functional level of the domain is Windows Server 2008. 
 You perform the following activities. 
  Create a global distribution group. 
    Add users to the global distribution group. 
    Create a shared folder on a Windows Server 2008 member server. 
    Place the global distribution group in a domain local group that has access to the shared folder. 
You need to ensure that the users have access to the shared folder. 
What should you do（）

A.Delete the computer accounts for each domain controller in the child domain. Remove the trust relationship between the parent domain and the child domain.
B.Run the Dcpromo tool that has individual answer files on each domain controller in the child domain.
C.Run the Computer Management console to stop the Domain Controller service on both domain controllers in the child domain.
D.Use Server Manager on both domain controllers in the child domain to uninstall the Active Directory domain services role.

A.Decrease the cost between the connection objects.
B.Decrease the replication interval for all connection objects.
C.Decrease the replication interval for the DEFAUL TIPSITELINK object.
D.Decrease the replication schedule for the DEFAUL TIPSITELINK object.

A.From the command prompt， run netdom /reset.
B.From the command prompt， run dfsutil /addroot.sysvol.
C.Raise the functional level of the domain to Windows Server 2008.
D.From the command prompt， run dcpromo /unattend：unattendfile.xml