What should be the minimum margin of safety while driving at high speeds?

Answer: A — Larger than at lower speeds

When driving at high speeds, the minimum margin of safety should indeed be larger than at lower speeds. This is because, at higher speeds, the stopping distance increases significantly due to the greater momentum of the vehicle. A larger margin allows for more reaction time to account for unexpected situations, such as sudden stops from vehicles in front or pedestrians entering the roadway. High speeds reduce the driver's ability to react quickly, making it crucial to maintain a sufficient distance from other vehicles to prevent collisions. In addition, the dynamics of handling and vehicle control change at higher speeds, which can make it more difficult to maneuver the vehicle effectively. Therefore, maintaining a larger margin of safety is essential for ensuring safe driving practices and promoting overall road safety.