What action should a driver take if they encounter a tire blowout?

Answer: B — Keep a firm grip on the wheel and reduce speed gradually

When a driver experiences a tire blowout, maintaining control of the vehicle is paramount. By keeping a firm grip on the steering wheel, the driver can better manage the vehicle's response to the sudden loss of tire pressure. Gradually reducing speed allows the driver to slow down without losing control, which is crucial in such a sudden and potentially dangerous situation. Suddenly applying the brakes hard can lead to a loss of control, as it may cause the vehicle to skid or tip over. Steering sharply to the side of the road can similarly result in overcorrection, leading to further instability or accidents. Accelerating in this scenario is not advisable, as it can worsen the loss of control and increase the risk of a crash. Hence, reducing speed gradually while holding the wheel steady is the safest action to take during a tire blowout.