Define coasting.

Answer: A — Keeping the clutch down or being in neutral

Coasting is the act of driving a vehicle with the clutch down or while in neutral. This allows the vehicle to continue moving without engaging the engine, allowing for a smoother and more fuel-efficient ride. The options B, C, and D are incorrect because they do not fully define coasting and/or do not necessarily involve disengaging or limiting the engine power. Driving with one hand on the steering wheel, limiting engine power to save fuel, and using cruise control can all be done while either engaging or disengaging the engine, and thus do not fully encompass the concept of coasting.