You must use your headlights
- from 30 minutes after sunset until 30 minutes before sunrise ✓
- from dawn to dusk
- from 5:00 a.m. to 10:00 p.m.
- when you think it is dark enough
Answer: A. from 30 minutes after sunset until 30 minutes before sunrise
You must use your headlights from 30 minutes after sunset until 30 minutes before sunrise.
Why this is the answer
The handbook's night-hazards section gives the required headlight period as starting half an hour after sunset and ending half an hour before sunrise. It states this as a must, so the choice that matches those two boundaries is correct. The passage also describes low and high beams, but the question asks when headlights are required, and the stated window is the only timing rule given.
Why the other answers are wrong
- B. from dawn to dusk — Choosing dawn to dusk does not match the handbook's stated window, which begins after sunset and ends before sunrise.
- C. from 5:00 a.m. to 10:00 p.m. — A fixed 5:00 a.m. to 10:00 p.m. schedule is not the rule the passage gives; the required period is tied to sunset and sunrise.
- D. when you think it is dark enough — Waiting until you judge it dark enough is not what the passage says; it sets a specific period beginning 30 minutes after sunset.
Remember it
Sunset plus thirty, sunrise minus thirty: that is the headlight window.