Your network contains an Active Directory forest named contoso.com. The forest contains
10 domains. Each domain contains 50 domain controllers that run Windows Server 2008 R2.
The domain functional level is Windows Server 2008.
You need to raise the domain functional level of all the domains to Windows Server 2008
R2.
What should you do?
A.
Run the dsadd.exe command
B.Run the nltest.exe command.
C.Run the Set-AdDomain cmdlet.
D.Run the dsmove.exe command.
E.Run the dcpromo.exe command.
F.Run the Move-AdDirectoryServer cmdlet.
G.Use the Active Directory Schema snap-in.
H.Use the Active Directory Users and Computers console.
h
H
C.
To raise the functional level of the domain:
– On the Source Server, click Start, point to Administrative Tools, and then click Active Directory Domains and Trust.
– In the console pane, right-click the domain for which you want to raise the functional level, and then click Raise Domain Functional Level.
https://msdn.microsoft.com/en-us/library/cc753104(v=ws.11).aspx
I believe that C – Run the Set-AdDomain cmdlet. is the right answer as “Each domain contains 50 domain controllers that run Windows Server 2008 R2” and Set-AdDomain cmdlet can be used to change the domain mode to a mode with higher functionality: https://technet.microsoft.com/en-us/library/ee617230.aspx