Which is a method for judging distance to avoid being too close to another vehicle?

Answer: B — The two second rule

The two second rule is a safe driving technique to judge the distance between your vehicle and the one in front of you. It advises drivers to maintain a minimum of two seconds between their vehicle and the vehicle in front of them. This is important as it allows enough time to react in case the car in front suddenly stops or changes direction. The other options, such as the one second rule or the three/four second rule, are not recommended as they do not provide enough distance for a safe reaction time. Additionally, these rules may not apply in different driving conditions such as heavy traffic or adverse weather. The two second rule is a commonly practiced and recommended technique for safe driving.