The correct answer is A. replace each part one at a time, rerunning the diagnostic before replacing the next part.
The other options are incorrect because:
- Option B: Checking to see if you have a software problem is not the best way to resolve this problem. If the diagnostic program reports that all of the parts have seen better days, it is more likely that the problem is with the hardware.
- Option C: Replacing everything at once and then rerunning the diagnostic is not a good idea because it is possible that only one of the parts is faulty. Replacing all of the parts at once would be a waste of money and time.
- Option D: Getting another copy of the diagnostic program is not necessary. The diagnostic program is likely to give the same results if it is run again.
- Option E: Running an exhaustive memory check is not the best way to resolve this problem. An exhaustive memory check is a time-consuming process that is not necessary in this case.
Therefore, the best way to resolve this problem is to replace each part one at a time, rerunning the diagnostic before replacing the next part. This will help to identify the faulty part and prevent unnecessary repairs.