When performing a hill start (slope start) on the test ramp, how does the candidate prevent vehicle rollback?

1. Release the handbrake instantly while the engine is at idle and stomp on the accelerator
2. Hold the car on the handbrake, set the clutch at the biting point with light throttle, and release the handbrake smoothly as drive engages
3. Slip the clutch continuously at maximum engine revs without using the handbrake
4. Allow the car to roll back until it rests against the safety barrier before accelerating