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單項選擇題

Your network contains an Active Directory domain. All domain controllers run Windows Server 2008  R2. Client computers run either Windows XP Service Pack 3 (SP3) or Windows Vista.  You need to ensure that all client computers can apply Group Policy preferences.  
What should you do()

A.Upgrade all Windows XP client computers to Windows 7.
B.Create a central store that contains the Group Policy ADMX files.
C.Install the Group Policy client-side extensions (CSEs) on all client computers.
D.Upgrade all Windows Vista client computers to Windows Vista Service Pack 2 (SP2).

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