How should you use the clutch's friction zone when pulling away from a complete stop?

1. Ease the clutch out to the friction zone while gently rolling on the throttle, then release it fully as the motorcycle gains speed.
2. Let the clutch lever snap out all at once while holding the throttle wide open.
3. Keep the clutch lever fully pulled in and rely on throttle alone to move the bike forward.
4. Close the throttle completely and drop the clutch to launch the motorcycle quickly.