What is "lighting time" according to the law?

1. AThe period during which there is natural light and there is no need to operate the vehicle's lights.
2. BNight-time as well as any other time when visibility is poor due to weather conditions or other reasons.
3. CThe period during which the vehicle's lighting system must operate on a non-urban road.
4. DOnly night-time, from sunset to sunrise.

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