B: As soon as the other vehicle moves out to overtake
C: As soon as the other vehicle passes you
D: After the other vehicle pulls in front of you
View hint
At night, you should dip your headlights to avoid dazzling oncoming drivers or those ahead of you. If you’re being overtaken, dip your headlights as the other vehicle comes past. When you switch to dipped beam, your view of the road ahead will be reduced, so look ahead for hazards on your side of the road before you do so.