While driving at night, you are dazzled by the headlights of an oncoming vehicle. What is the most appropriate response?

1. ①Switch on your own high beams in response.
2. ②Look straight at the oncoming headlights to judge the distance accurately.
3. ③Shift your gaze slightly toward the right edge of the road and slow down.
4. ④Close your eyes briefly until the vehicle has passed.