You have a server named Server1 that runs Windows Server 2012 R2. Server1 has the Windows Deployment Services server role installed.
You back up Server1 each day by using Windows Server Backup.
The disk array on Server1 fails.
You replace the disk array.
You need to restore Server1 as quickly as possible. What should you do?

A.
Start Server1 from the Windows Server 2012 R2 installation media.

B.
Start Server1and press F8.

C.
Start Server1 and press Shift+F8.

D.
Start Server1 by using the PXE.

Explanation:
A)
Recovery of the OS uses the Windows Setup Disc
http://technet.microsoft.com/en-us/library/cc753920.aspx
http://www.windowsnetworking.com/articles_tutorials/Restoring-Windows-Server-BareMetal.html