The parking light must be used...
A)when double-parked.
B)when stopped on urban roads that are sufficiently or insufficiently lit.
C)when parking on insufficiently lit through roads.Correct
The parking light may be used between sunset and sunrise or under meteorological or environmental conditions that significantly reduce visibility, to mark vehicles parked on the carriageway or hard shoulder of an insufficiently lit through road.
If your vehicle does not have a parking light, you may leave the position lights on the side corresponding to the carriageway, if parked in line.
If your vehicle does not have a parking light, you may leave the position lights on the side corresponding to the carriageway, if parked in line.