Regulation text: 'Drivers must turn on headlights from one-half hour after sunset to one-half hour before sunrise, and also whenever weather conditions reduce visibility to 500 feet or less.' When ELSE besides nighttime must headlights be used?
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A
During school zone hours
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B
Whenever following a truck
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C
When visibility is 500 feet or less due to weather
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D
On roads with speed limits above 55 mph