Avehicle's headlights should be utilized to ensure the safety of the driver and of others. a. during hours of darkness b. whenever conditions prevent a driver from clearly discerning a person or other motor vehicle on the highway from a distance of 1000 feet. c. in weather conditions requiring the windshield wipers to be in continuous use due to rain, mist, snow, fog, or other precipitation or atmospheric moisture. d. within 30 minutes after the sun sets, all night and until 30 minutes before the sun rises. e. all of the above