Why do empty trucks require greater stopping distances?

Answer: B — They have less traction

Empty trucks require greater stopping distances primarily due to less traction. When a truck is empty, there is a decrease in the weight pressing down on the tires. This reduction in weight means that there is less friction between the tires and the road surface, which can lead to a longer stopping distance. Traction is crucial for effective braking; without enough grip, the truck may skid or slide instead of stopping promptly. This characteristic of empty trucks is particularly important to understand to ensure safe driving practices, especially in adverse weather conditions or when immediate stopping is required.