The correct option, 'Pump the brakes rapidly and shift into a lower gear,' is appropriate because it addresses immediate actions a driver should take to regain control of the vehicle. In Ontario, the Ontario Highway Traffic Act dictates that drivers should manage emergency situations by trying to regain control while ensuring the safety of themselves and others. Pumping the brakes might help rebuild enough hydraulic pressure to stop the vehicle if the problem is minor, while downshifting to a lower gear uses engine braking to slow down the car. It’s crucial to remain calm and take these corrective actions promptly.