What should you do if you experience brake failure while driving?

Answer: B — Downshift and pump the brakes

When experiencing brake failure while driving, the correct action involves downshifting and pumping the brakes. Downshifting can help slow the vehicle by allowing the engine to assist with braking, especially in a manual transmission. This engine braking can be effective in reducing speed when the regular brakes are not functioning. Additionally, pumping the brakes may help build up brake pressure in some instances, especially if the brake fluid level is low or if there is air in the lines. This method aims to regain some level of braking control and reduce the overall speed of the vehicle gradually. Using emergency brakes immediately can sometimes lead to locking the rear wheels, which can cause a loss of control. Steering toward the shoulder of the road is generally a wise precaution when dealing with brake failure; however, the priority should be on trying to slow the vehicle safely. Speeding up to gain control is counterproductive and increases the risk of losing control entirely. Thus, the combination of downshifting and pumping the brakes is a more effective approach to manage the situation safely.