Which three actions should you recommend?

DRAG DROP
Your network contains an Active Directory domain named contoso.com. The domain contains two
domain controllers named DC1 and DC2 that run Windows Server 2008 R2.
You plan to replace the domain controllers with new servers that run Windows Server 2012. The new
servers will be named DC3 and DC4.
You need to recommend a strategy to replace DC1 and DC2 with DC3 and DC4. The solution must
minimize the amount of disruption to the users.
Which three actions should you recommend?
To answer, move the appropriate three actions from the list of actions to the answer area and arrange
them in the correct order.

Answer: See the explanation

Explanation:
Box 1: Install the Active Directory Domain Services role on DC3 and DC4.
Box 2: Run the AD Services Config Wizard on DC3 and DC4.
Box 3: dcpromo on DC1 and DC2.
* Step 1-2:
AD DS can be installed in Windows Server 2012 by using the Add Roles Wizard in Server Manager,
followed by the Active Directory Domain Services Configuration Wizard, which is new beginning in
Windows Server 2012.
*Step 3: dcpromo
Installs and removes Active Directory Domain Services (AD DS).
In this case we want to remove AD DS from DC1 and DC2.
Install Active Directory Domain Services (Level 100)
https://technet.microsoft.com/en-us/library/hh472162.aspx