The vehicle in the image is driving with the rear fog light on. Is this correct?

A)Yes, because there is fog.
B)No, because the fog is not dense.Correct
C)Yes, it can be used optionally when there is a little fog.
FRONT FOG LIGHT:
- Its installation and use is NOT mandatory.
- It will be white or selective yellow.
- It will be used, voluntarily, in the case of fog, heavy rain, snowfall, clouds of smoke or dust, or in similar circumstances.
- It can also be used on narrow roads with many curves, that is, those with a carriageway 6.5 m wide or less, marked with "dangerous curves" signs. REAR FOG LIGHT:
- Its installation and use is mandatory.
- It will be red.
- It will be used, mandatorily, in the case of THICK fog, VERY heavy rain, HEAVY snowfall or DENSE clouds of smoke or dust (it is forbidden to use it outside these situations). Front fog lights, during the day, may be on alone with position lights, but may also be used together with low or high beam lights. At night, they will be used at least with low beam lights. Rear fog lights, during the day, will be used at least together with the front fog or low beam lights. At night, at least with low beam lights.
- Its installation and use is NOT mandatory.
- It will be white or selective yellow.
- It will be used, voluntarily, in the case of fog, heavy rain, snowfall, clouds of smoke or dust, or in similar circumstances.
- It can also be used on narrow roads with many curves, that is, those with a carriageway 6.5 m wide or less, marked with "dangerous curves" signs. REAR FOG LIGHT:
- Its installation and use is mandatory.
- It will be red.
- It will be used, mandatorily, in the case of THICK fog, VERY heavy rain, HEAVY snowfall or DENSE clouds of smoke or dust (it is forbidden to use it outside these situations). Front fog lights, during the day, may be on alone with position lights, but may also be used together with low or high beam lights. At night, they will be used at least with low beam lights. Rear fog lights, during the day, will be used at least together with the front fog or low beam lights. At night, at least with low beam lights.