When driving in fog, rain, or snow, use:

  1. Low beams. ✓
  2. High beams.
  3. Fog lights only.

Answer: A. Low beams.

Use low beams when driving in fog, rain, or snow.

Why this is the answer

The handbook says that if you need your windshield wipers because of fog, rain, or snow, you must turn on your low-beam headlights. It also says to use low beams in heavy fog or smoke because high beams reflect back and cause glare. That is why low beams are the right choice in these conditions.

Why the other answers are wrong

Remember it

When your wipers are on for weather, switch your headlights to low beams.

Official handbook: California Driver Handbook (DL 600), Section 5: An Introduction to Driving, p. 11

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.