What should a driving instructor do when intervening physically with dual pedals (Doppelpedale) or steering wheel during an acute danger situation?

1. Delay intervention until the learner identifies the danger independently, even when the remaining margin is disappearing
2. Intervene decisively and smoothly, give a clear concise verbal instruction simultaneously, stabilize the vehicle, and pull over safely when possible to debrief the situation calmly without blaming
3. Use the dual brake without any verbal cue, then immediately resume the lesson without discussing what occurred
4. Never intervene under any circumstances, allowing the accident to happen so the student learns