How many rear reflectors are required on a vehicle?

The requirement for rear reflectors on a vehicle is that there must be two. This regulation is set to ensure that vehicles are adequately visible to others in low-light conditions and to enhance safety on the road. Having two rear reflectors allows for better visibility from multiple angles, as they can reflect light from any direction, making it easier for other drivers to identify the vehicle, especially at night or during poor weather conditions. This regulation helps in reducing the risk of accidents by ensuring that vehicles are clearly marked and visible.

The other options do not meet the necessary criteria established for vehicle safety and visibility standards, as having fewer than two reflectors would not provide the same level of safety.