What should a driver do to ensure they can stop quickly in an emergency?

Answer: A — Maintain a safe following distance

Maintaining a safe following distance is crucial for allowing a driver the time and space needed to react in an emergency situation. This distance provides a buffer zone that enables the driver to stop or maneuver safely without colliding with the vehicle in front. If a driver is too close, sudden braking by the vehicle ahead can lead to a crash since there may not be enough reaction time to stop safely. Having ample following distance means a driver can also better assess road conditions and the behavior of other drivers. In emergencies, such as an unexpected stop by another vehicle or obstacles in the road, this space gives the driver the flexibility to apply brakes and make necessary adjustments to avoid an accident. In contrast, driving at higher speeds, applying brakes last minute, or solely relying on engine braking can significantly decrease reaction time and increase the risk of a collision.