What should you do if your vehicle starts to overheat?

Answer: B — Pull over when safe, turn off the engine, and allow it to cool

If your vehicle starts to overheat, the best course of action is to pull over when it is safe, turn off the engine, and allow it to cool. This answer is correct because overheating can lead to severe engine damage if not addressed promptly. Turning off the engine prevents further overheating and allows the vehicle to cool down safely. Continuing to drive while the vehicle is overheating can cause critical parts of the engine, like the cylinder head or head gasket, to warp or fail. Similarly, while turning on the air conditioning may seem like a way to alleviate stress on the engine, it actually places additional load on it, which could exacerbate the overheating issue. Keeping the heater on might provide some temporary relief by directing heat away from the engine, but it is not a reliable solution and could still risk long-term damage if the vehicle is not stopped and allowed to cool down.