Your network contains an Active Directory domain named contoso.com. The domain contains five  domain controllers. You add a logoff script to an existing Group Policy object （GPO）. You need to verify that each  domain controller successfully replicates the updated group policy.     Which two objects should you verify on each domain controller（）

• A、/servername/SYSVOL/contoso.com/Policies/{GUID}/gpt.ini
• B、//servername/SYSVOL/contoso.com/Policies/{GUID}/machine/registry.pol
• C、the uSNChanged value for the CN={GUID}，CN=Policies，CN=System，DC=contoso，DC=com container
• D、the versionNumber value for the CN={GUID}，CN=Policies，CN=System，DC=contoso，DC=com container