You have a Visual Studio Team Foundation Server 2010 environment that includes team project collections named CollectionA and CollectionB. You intend to perform maintenance on CollectionA while still allowing users to connect to CollectionB.
You need to prevent end users from using CollectionA, and display a notification that CollectionA is offline, but still associated with Team Foundation Server, to users who attempt to connect to the team project collection.
What should you do?

A.
On the application tier server, display the EnableServicing page for the TeamProjectCollectionWebService Web service and then invoke the Web service method.

B.
On the application tier server, display the AddServicingOperation page for the TeamProjectCollectionWebService Web service and then invoke the Web service method.

C.
In the Team Project Collections node of the Team Foundation Server Administration Console, use the Stop Collection command for CollectionA and specify the servicing message.

D.
In the Team Project Collections node of the Team Foundation Server Administration Console, use the Detach Collection command for CollectionA and specify the servicing message.