Your network contains an Active Directory forest. The forest contains multiple domains.

You need to ensure that users in the human resources department can search for employees by using the employeeNumber attribute.

What should you do?

A.
From Active Directory Sites and Services, modify the properties of each global catalog server.

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

C.
From Active Directory Sites and Services, modify the NTDS Settings objectof each global catalog server.

D.
From the Active Directory Schema snap-in, modify the properties of the employeeNumber attribute.