What is the correct way of driving downhill?

1. By shifting to neutral gear, to save on fuel.
2. By shifting to one of the gears and continuously stepping on the clutch pedal.
3. By shifting to high gear and continuously stepping on the brake pedal.
4. Correct answer: By driving in one of the gears.

WhyGo downhill with a gear engaged, not in neutral. Holding the clutch or braking constantly is also wrong.