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.

Explanation:
http://technet.microsoft.com/en-us/library/how-global-catalog-servers-work.aspx
Global Catalog Replication of Additions to the Partial Attribute Set
Each global catalog server in an AD DS forest hosts a copy of every existing object in that
forest. For the objects of its own domain, a global catalog server has information related to
all attributes that are associated with those objects. For the objects in domains other than its
own, a global catalog server has only information that is related to the set of attributes that
are marked in the AD DS schema to be included in the partial attribute set (PAS). As
described earlier, the PAS is defined by Microsoft as those attributes that are most likely to

be used for searches. These attributes are replicated to every global catalog server in an AD
DS forest.” “The attributes that are replicated to the global catalog by default include a base
set that have been defined by Microsoft as the attributes that are most likely to be used in
searches. Administrators can use the Microsoft Management Console (MMC) Active
Directory Schema snap-in to specify additional attributes to meet the needs of their
installation. In the Active Directory Schema snap-in, you can select the Replicate this
attribute to the global catalog check box to designate an attributeSchema object as a
member of the PAS, which sets the value of the isMemberOfPartialAttributeSet attribute to
TRUE.