Which example follows the most appropriate sequence for computer troubleshooting?

Correct answer: Identify the problem, check simple causes, make a change, and verify the result

The governing principle of troubleshooting is a systematic, least-risk process. First define the symptom, then check simple causes such as power, cables, settings, or connections. Make one justified change at a time and verify whether the symptom has disappeared. Option A is correct because it limits unnecessary replacement and protects data; the other options are unsafe, wasteful, or unrelated first steps.