Is it possible to save fuel by avoiding unnecessary gear changes?
A)No, in no case.
B)It depends on whether the vehicle has a diesel or gasoline engine.
C)Yes.Correct
# Explanation
**Yes, it is possible to save fuel by avoiding unnecessary gear changes.** Each gear change involves a temporary disconnection of the engine, which generates additional fuel consumption. By maintaining an appropriate and steady gear, without abrupt or excessive changes, you optimize engine efficiency and reduce fuel consumption. Smooth and anticipatory driving is key to energy savings.