What measure is it important to take before stepping on the brake pedal in order to slow down or to stop?

1. Ease off the accelerator and shift to lower gear.
2. Correct answer: Check if there is a vehicle behind by glancing at the mirrors.
3. Step on the clutch pedal, to reduce the engine’s fuel consumption.
4. Signal and turn the wheel to the “hard shoulder”, to avoid rear-end collision.

WhyBefore every braking, glance at the mirrors to see whether someone is behind you. Then you will not be rear-ended.