Which two actions should you perform?

Your network contains a single Active Directory domain.
A domain controller named DC2 fails.
You need to remove DC2 from Active Directory.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
At the command prompt, run dcdiag.exe /fix.

B.
At the command prompt, run netdom.exe remove dc2.

C.
From Active Directory Sites and Services, delete DC2.

D.
From Active Directory Users and Computers, delete DC2.