Which of the following command line options could you use in order to launch the disk defragmenter utility?

You are working as a technician at Domain.com. You are troubleshooting a Windows XP Professional computer with Service Pack 2 that is unusually slow and suspect that file fragmentation might be the cause of the problem. Which of the following command line options could you use in order to launch the disk defragmenter utility?

A.
DEFRAG with the proper switches

B.
MMC with the proper switches

C.
CLEANDSK with the proper switches

D.
CHKDSK with the proper switches

Explanation:
MMC is the Microsoft Management Console, CLEANDSK does not exist and CHKDSK is a command in DOS and Microsoft Windows systems which verify a hard disk or a floppy disk for file system integrity.