How far should you dim your lights when following a vehicle?

Answer: A — 200 feet

When following a vehicle, it is recommended to dim your lights at least 200 feet away. This is to ensure that you are not causing discomfort or blinding the driver in front of you. Options B, C, and D may seem like feasible distances, however, they may be too close and lead to unsafe driving conditions. Additionally, it is important to always adjust your speed and turn off high beams when approaching other vehicles to maintain a safe distance and visibility.