A learner drifts slightly out of position on a bend but corrects it themselves before the instructor says anything. What is the best instructional response?

1. Criticise the learner for drifting in the first place, ignoring the self-correction
2. Acknowledge the self-correction positively, reinforcing the learner's growing self-awareness
3. Take control immediately even though the situation was already resolved safely
4. Say nothing at all so the learner does not realise it happened