Is it this question? I think the hardest question in the world is the one you just asked! Am I right?
Disk Defragmenter
A disk defragmenter is a utility that reorganizes the files and unused space on a computer's hard disk so that the operating system accesses data more quickly and programs run faster.
Answer:
3
Explanation:
I've just taken the test and made a 100. 3 is the most logical answer aswell, it has more of an effect than the others.