Your company has an Active Directory forest that contains Windows Server 2008 R2 domain  controllers and DNS servers. All client computers run Windows XP SP3.   You need to use your client computers to edit domain-based GPOs by using the ADMX files that are   stored in the ADMX central store.  What should you do（）

• A、Add your account to the Domain Admins group.
• B、Upgrade your client computers to Windows 7.
• C、Install .NET Framework 3.0 on your client computers.
• D、Create a folder on PDC emulator for the domain in the PolicyDefinitions path. Copy the ADMX files to  the PolicyDefinitions folder.