A user’s PC has four hard drives in a RAID setup. After a single drive fails, the system will no
longer boot and even rescue disks cannot see or access the volume. Which of the following RAID
types was the user MOST likely using?

A.
0

B.
1

C.
5

D.
6

Explanation:
http://www.thegeekstuff.com/2010/08/raid-levels-tutorial/