What must be done if a load projects 4 feet or more from the rear of a vehicle?

• Attach a yellow flag during the day and a white light at night
• Attach a red flag, at least 12 inches square, during the day and a red light visible for 200 feet at night
  Explanation:

  "If a load projects 4 feet or more from the rear of a vehicle, a red flag at least 12 inches square must be attached at its end in daytime, and a red light, visible for at least 200 feet, must be attached to the end at night."
• Use a green flag during the day and a flashing light at night
• Place a white flag and a reflective sign at the end