You are working as a technician at AIOTestKing.com. You boss has heard of a way to re-index the hard drive and by that make the computer a little faster and wants to know which Windows tool to use in order to re-index the hard drive. What will you answer him?

A.
Disk Defragmenter

B.
CHKDSK

C.
System Restore

D.
Disk Cleanup