The correct choice highlights an important safety consideration when driving behind large trucks, particularly when stopped on an incline. When a truck is at a stop on an upgrade, it may roll back slightly when it begins to accelerate. Leaving space is crucial for safety, as it allows the vehicle behind to avoid a collision if the truck drifts back. This practice ensures that drivers maintain a safe buffer, fostering more responsible behavior on the road.
Regarding the other options, they present facts but do not encapsulate the primary concern of maintaining safety distance when stopped behind larger vehicles. For instance, it is true that trucks may have less traction and can take longer to stop, particularly under less-than-ideal conditions, but this is more relevant for general driving behavior rather than the specific scenario described in the correct answer. The use of high-beam headlights when following a truck also doesn't contribute to safety and can indeed blind the truck driver, causing potential hazards. Therefore, while those statements contain valid information about large truck dynamics, they do not specifically address the immediate safety action to take as articulated in the correct answer.