Your network contains an Active Directory domainnamed contoso.com.
The domain contains five domain controllers.
You add a logoff scriptto an existing Group Policy object (GPO).
You need to verify that each domain controller successfully replicates the updated group policy.
Which two objectsshould you verify on each domain controller?
(Each correct answer presents part of the solution. Choose two.)

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

Explanation:
http://technet.microsoft.com/en-us/library/cc784268%28v=ws.10%29.aspx
How Core Group Policy Works
…
The Gpt.ini File
The Gpt.ini file is located at the root of each Group Policy template. Each Gpt.ini file contains GPO version
information. Except for the Gpt.ini files created for the default GPOs, a display name value is also written to the
file.
Each Gpt.ini file contains the GPO version number of the Group Policy template.
[General]
Version=65539
Normally, this is identical to the version-number property of the corresponding GroupPolicyContainer
object. It is encoded in the same way — as a decimal representation of a 4 byte hexadecimal number, the
upper two bytes of which contain the GPO user settings version and the lower two bytes contain the computer
settings version. In this example the version is equal to 10003 hexadecimal giving a user settings version of 1
and a computer settings version of 3.
Storing this version number in the Gpt.ini allows the CSEs to check if the client is out of date to the last
processing of policy settings or if the currently applied policy settings (cached policies) are up-to-date. If the
cached version is different from the version in theGroup Policy template or Group Policy container, then policy
settings will be reprocessed.