When a heavy fog occurs, you should: When a heavy fog occurs, you should:

• A. park at a rest area or vehicle stop until the fog has lifted.
• B. drive slowly and turn on the headlights
• C. turn on your headlights and switch on the windshield wipers
•  

  The correct answer is A

   

  There are cases where the fog is so heavy it's hard to see even with your high-beam lights on. In this type of situation the best thing to do is stop driving, park your vehicle at a safe place.