Your network contains an Active Directory forest.

All users have a value set for the Department attribute.

From Active Directory Users and computers, you search a domain for all users who have a Department attribute value of Marketing.

The search returns 50 users.

From Active Directory Users and Computers, you search the entire directory for all users who have a Department attribute value of Marketing.

The search does not return any users.

You need to ensure that a search of the entire directory for users in the marketing department returns all of the users who have the Marketing Department attribute.

What should you do?

A.
Install the Windows Search Service role service on a global catalog server.

B.
From the Active Directory Schema snap-in, modify the properties of the Department attribute.

C.
Install the Indexing Service role service on a global catalog server.

D.
From the Active Directory Schema snap-in, modify the properties of the user class.