Which of the following commands may need to be run after a virus removal if the computer will not boot?

Which of the following commands may need to be run after a virus removal if the computer will not
boot?

A.
SCANDSK

B.
DXDIAG

C.
FIXMBR

D.
MSCONFIG

Explanation:
http://pcsupport.about.com/od/termsf/p/fixmbr.htm