If you drive your car at night on an insufficiently lit interurban road at less than 40 km/h, which lights can you have on?

If you drive your car at night on an insufficiently lit interurban road at less than 40 km/h, which lights can you have on?
A)Only the high-beam.
B)Only the low-beam.
C)The high-beam or low-beam.Correct
High-beam or main-beam lights shall be used by vehicles equipped with them when driving at more than 40 km/h:
- Between sunset and sunrise, on insufficiently lit interurban roads.
- At any time of day, in tunnels, underpasses and road sections affected by the Tunnel sign, insufficiently lit.
However, low-beam or dipped lights shall be used by:
- Vehicles that do not have high-beam lights.
- Those driving with high-beam lights and which may dazzle other users.
When driving at a speed not exceeding 40 km/h, low-beam or high-beam lights may be used.
It is forbidden to use high-beam lights with the vehicle stopped, parked or within built-up areas.
In this case, since not driving above 40 km/h, the high-beam light is optional and not mandatory.