To save fuel I must...

To save fuel I must...
A)Drive closer to the vehicle in front to reduce air resistance.
B)Keep the speed as high and constant as possible.
C)Drive smoothly, without sudden braking or acceleration.Correct
Efficient driving is based on smoothness and anticipation. Sudden acceleration and braking lead to very high and unnecessary fuel consumption. Therefore, it is essential to maintain as uniform a speed as possible, avoiding changes in pace so the engine works optimally.