Your network contains an Active Directory domain named contoso.com. All domain controllers run Windows Server 2008 R2. One of the domain controllers is named DC1.
The network contains a member server named Server1 that runs Windows Server 2012 R2.
You need to promote Server1 to a domain controller by using install from media (IFM).
What should you do first?
A . Run the Active Directory Domain Services Installation Wizard on DC1.
B . Upgrade DC1 to Windows Server 2012 R2.
C . Run the Active Directory Domain Services Configuration Wizard on Server1.
D . Create a system state backup of DC1.
E . Create IFM media on DC1.
Answer: B
Explanation:
This is the only valid option. You could install ADDS role on Server 1 and run ADDS configuration wizard and add DC to existing domain.