A learner repeatedly stalls when moving off, even after being told to 'give more gas'. What does effective fault analysis require the instructor to do?

1. Keep repeating the same instruction, since eventually it should work
2. Assume the learner is simply not trying hard enough
3. Skip moving off entirely and focus only on other skills instead
4. Identify the underlying cause of the stalling, such as poor clutch control or observation timing, rather than only addressing the visible symptom