A User Calls You Complaining That for About a Month

Multiple Choice

A user calls you complaining that for about a month his hard drive has intermittently worked and then not worked-for months before that it has worked fine. He has tried reseating the cables to no avail. What would you advise the user?

A) This is normal of hard drives.
B) Back up the hard drive immediately.
C) Replace the IDE or SATA cables.
D) Replace the power supply.