What action should you take if you notice that your vehicle is being tailgated?

Answer: D — Increase your following distance

If you notice that your vehicle is being tailgated, the most prudent action is to increase your following distance. This means allowing more space between your vehicle and the one in front of you. By doing so, you create a buffer that provides more reaction time in case the vehicle in front of you slows down or stops suddenly. This can help prevent accidents in the event of an unanticipated stop, as it minimizes the risk of a rear-end collision. Increasing your following distance also signals to the tailgater that you are aware of their presence and are taking defensive measures. It can potentially encourage them to either back off or change lanes, enhancing your overall safety on the road. Meanwhile, actions like slamming on the brakes, speeding up, or changing lanes abruptly can lead to dangerous situations and could escalate the risk of an accident.