You have a SharePoint site. The current master page of the site is v4.master. You create a

custom master page named MyMasterPage.master and deploy it to /_catalogs/masterpage/. You
need to apply the custom master page to the site and ensure that future pages added to the site,
including system and application pages, automatically use the custom master page. You must
also ensure that future SharePoint updates do not remove or modify the changes you have made.
What should you do?

A.
In the ©Page directive of each page layout, set the MasterPageFile attribute to
/_catalogs/masterpage/MyMasterPage.master.

B.
Rename the custom master page as v4.master and overwrite
\14\TEMPLATE\GL0BAL\v4.master.

C.
Rename the custom master page as v4.master and overwrite
/_catalogs/masterpage/v4,master.

D.
Set the MasterUrl property and CustomMasterUrl property of the site to
/_catalogs/masterpage/MyMasterPage.master,