Your network contains an Active Directory forest named contoso.com. All domain controllers currently run Windows Server

[answerhappygod]

Your network contains an Active Directory forest named contoso.com. All domain controllers currently run Windows Server 2008 R2.
You plan to install a new domain controller named DC4 that runs Windows Server 2012 R2.
The new domain controller will have the following configurations:
✑ Schema master
✑ Global catalog server
✑ Active Directory Federation Services server role
✑ Active Directory Certificate Services server role
You need to identify which configuration can be fulfilled by using the Active Directory Domain Services Configuration Wizard.
Which configuration should you identify?

A. Enable the global catalog server.
B. Install the DNS Server role.
C. Install the Active Directory Certificate Services role.
D. Transfer the schema master.