Always turn on the low beams, yellow lights and wipers to see in the rain and fog, slow down if it's too dangerous, stop and signal other vehicles to know
Answer 3 is wrong because no the high beams are turned on in the fog, because it will not be visible, accelerating will be extremely dangerous
Turn on the low beam and yellow lights, control the wipers, control the car to go at a slow speed so that you can see.
Find a safe place to stop the car, turn on the emergency stop light to signal to other vehicles.
Turn on the high beam and yellow lights, control the wipers, increase the speed of driving the car through the rainy or foggy area.