What should a driver do if heavy rain reduces visibility?

Answer: C — Slow down and use headlights

When heavy rain reduces visibility, it is crucial for a driver to slow down and use headlights. Reducing speed is important because it allows for better control of the vehicle in slippery conditions and provides more time to react to any hazards. Rain can create slick roads, increasing the risk of hydroplaning, so maintaining a lower speed helps ensure safety. Using headlights during rain is equally important as it enhances visibility not only for the driver but also for other road users. While driving in rain, the natural light is diminished, and using headlights ensures that the driver can see the road better and helps others see the vehicle, reducing the chances of collisions. Choosing to speed up or turn off headlights would be dangerous. Speeding might lead to losing control of the vehicle, and turning off headlights severely limits visibility, making it difficult to see the road and be seen by others. Pulling over and waiting for the rain to stop can sometimes be a safe option; however, it may not always be practical or necessary, especially if the rain is light or variable. Therefore, the best practice is to slow down and use headlights to navigate safely through heavy rain.