Your network contains a SharePoint server 2007 server farm , the farm contains a site created by using the search center template , you create a new document template that contains a custom column named Employee ID, you need to ensure that users can search for documents by using the Emploee ID Property .

What should you do first ?

A.
create a search scope

B.
Create a site content type .

C.
Add a managed property .

D.
Add a filter web part .