What must the driver do if one of the two headlights in his vehicle fails during lighting time?

1. AIt is permitted to continue driving, provided that the parking light is on and working.
2. BIt is forbidden to continue driving even if the front fog light is working and on.
3. CThe law permits driving slowly to the nearest garage.
4. DHe must stop. It is forbidden to continue driving as long as the light is faulty.

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