How can you recover the Default Domain Controllers and Default Domain group policy objects?

Your role of Network Administrator at AIOTestking.com includes the management of an Active
Directory Domain Services (AD DS) domain named AIOTestking.com. All servers in the AIOTestking.com

domain have Microsoft Windows Server 2012 R2 installed.
You discover that group policy settings that should apply to all domain computers are not being
applied. You troubleshoot the issue and discover that the Default Domain Controllers and Default
Domain group policy objects (GPOs) are corrupted.
You do not have a backup of the GPOs.
How can you recover the Default Domain Controllers and Default Domain group policy objects?

A.
You should run the dcdiag.exe utility.

B.
You should run the dcgpofix.exe utility.

C.
You should run the ntdsutil.exe utility.

D.
You should run the dcpromo.exe utility.