Which of the following should you do to ensure safe night driving?

• Make sure your headlights are working properly and the lenses are clean.
• Watch carefully for highway signs, pedestrians and vehicles stopped along the edge of the road.
• Keep your windshield clean.
• All of the above.
  Explanation:

  "You can help ensure safe driving in several ways. 1. Ensure your headlights are working properly and the lenses are kept clean. Periodically, have them checked for correct aim/alignment. 2. Keep your windshield clean. 3. Watch carefully for highway signs; they are harder to see at night. 4. Watch carefully for pedestrians and for vehicles stopped along the edge of the road."