Règles de la route

Another driver is tailgating you. The safest response is to:

Afficher la réponse et l'explication
Bonne réponse : B. Increase your gap to the vehicle ahead so you can brake gently if needed

Adding space ahead of you means you can brake smoothly, not suddenly — reducing the chance the tailgater rear-ends you. Brake-checking invites a collision and is an offence.