You should avoid driving in fog, but if that is not possible or you get caught driving in fog, then what should you do?

• You should slow down and drive at a speed that suits the condition.
• You should make sure your vehicle's full lighting system is turned on.
• You should use low-beam headlights.
• All of the above.
  Explanation:

  "

  If you are caught driving in fog, you should follow these safe-driving tips:
  1) Slow down gradually and drive at a speed that suits the conditions.
  2) Make sure the full lighting system of your vehicle is turned on.
  3) Use your low-beam headlights, as high beams reflect off the moisture droplets in the fog, making it harder to see.

  "