To drive efficiently and reduce fuel consumption, it is advisable to:

A)Reduce the safety distance in order to see everything sooner.
B)Accelerate when pulling away.
C)Increase the safety distance in order to have more time to react.Correct
Efficient driving requires applying preventive driving techniques (vision, anticipation and space) and thus anticipating what is going to happen with enough time to act without abrupt movements on the vehicle's controls.
This will help us save fuel and pollute less.