As you increase the speed of your car, the engine has to operate at higher and higher speeds in order to move the car along. If the engine was left in a low gear, the speed could become so excessive that it might damage the engine. Which of these will prevent this from occurring?
A. Shifting the vehicle into a lower gear to increase engine speed
B. Shifting the vehicle into a higher gear to increase engine speed
C. Shifting the vehicle into a higher gear to reduce engine speed
D. Shifting the vehicle into a lower gear to reduce engine speed