While driving on a rainy day, the inside of the windscreen fogs up and you can hardly see ahead. What is the most appropriate action?

1. ①Turn on the air conditioning (dehumidifying), switch to outside-air intake and direct the airflow onto the windscreen.
2. ②Close all the windows and switch to recirculation mode so that only the cabin air circulates.
3. ③Keep driving at your usual speed while wiping the windscreen with your hand or sleeve.
4. ④Stop right where you are in your driving lane until the fog clears.