Which of the following are required during nighttime or low visibility conditions to mark the load extending beyond a vehicle's sides and rear?

• Two red reflectors on the each side of the load that can be seen from 100 to 600 feet to the rear
• Two red lamps on the back of the load visible from at least 500 feet to the rear
• One red lamp on each side of the load, visible from at least 500 feet
• All of the above
  Explanation:

  "From sunset to sunrise, and during any rain, smoke, or fog, loads extending beyond a vehicle's sides and rear must be marked as follows: 1. Two red lamps on the back of the load, visible from at least 500 feet to the rear. 2. Two red reflectors on the rear, visible from 100 to 600 feet when directly in front of low-beam headlights, positioned to show the load’s full width. 3. One red lamp on each side of the load, visible from at least 500 feet, to indicate the maximum overhang of the load."