What might be a potential risk of not following the good rule regarding following distance?

Maintaining an adequate following distance is crucial for safe driving, especially when operating a school bus, which typically requires more stopping distance due to its size and weight. Not adhering to this good rule can significantly increase the likelihood of rear-end collisions. When a driver follows too closely, they have less time to react to sudden stops or slowdowns of the vehicle in front of them. This means that in the event of an unexpected situation, such as a sudden stop by the lead vehicle, the driver may not be able to stop in time, resulting in a collision.

By maintaining a safe distance, drivers can ensure they have sufficient reaction time, allowing for safer maneuvering and minimizing the risk of an accident. Thus, the increased likelihood of rear-end collisions directly correlates with poor following distance management, making this choice the most accurate reflection of the potential risks involved.