When visibility conditions are impaired:

1. Stay close to the vehicle in front, to be assisted by its lights.
2. Keep to the right of the road and drive faster until visibility conditions improve.
3. Correct answer: Drive slower and maintain a wider gap from the vehicle in front.
4. Maintain normal speed, but remain constantly alert in case an emergency brake is required.

WhyIn poor visibility, slow down and keep a bigger gap than usual from the vehicle in front.