When should you use your headlights?

• One-half hour after sunset to one-half hour before sunrise.
• On an open street if there are no other cars nearby; in this case, use the high beam.
• Where there are street lights, fog, rain, snow, or other adverse weather conditions; here, you should use the low beam.
• All of the above.
  Explanation:

  "Use your headlights: 1) When a road sign state that headlights must be used. 2) One-half hour after sunset to one-half hour before sunrise. 3) Use high beams in open street if there are no other cars nearby. Speed should be slower than it is by day. 4) Use low beams where there are street lights, fog, rain, snow or adverse weather conditions."