Which of the following commands would you enter at the command prompt in Windows XP Professional Service Pack 2 when you want to defragment the C drive?

Which of the following commands would you enter at the command prompt in Windows XP Professional Service Pack 2 when you want to defragment the C drive?

A.
DEFRAG C:

B.
FDISK

C.
SCANDISK

D.
CHKDSK C: /F