You Find That Disk Operations on Your Server Have Gradually

You find that disk operations on your server have gradually gotten slower. You look at the hard disk light and it seems to be almost constantly active and the disk seems noisier than when you first installed the system. What is the likely problem?

A) the disk spindles need to be greased
B) the disk is fragmented
C) there are bad sectors on the disk
D) you have not implemented quotas