A combination of a passenger car with a light trailer, measuring less than 7 metres, where should it travel?

A)In either of the two left-hand lanes, as this is the maximum speed at which it can travel.
B)In the right-hand lane, as this is the only one permitted for trailers.
C)In the right-hand lane, although it may travel in any of the three.Correct
On roads outside built-up areas with more than one lane reserved for its direction of travel, vehicle combinations less than 7 metres long shall normally travel in the lane furthest to the right, although they may use the other lanes when traffic or road conditions advise it, on condition that they do not hinder the progress of vehicles following them. Outside built-up areas on roads with 3 or more lanes, lorries, vans and special vehicles with a MAM exceeding 3,500 kg, and combinations more than 7 metres in length, shall travel in the right-hand lane and may exceptionally use the immediately adjacent one, but never the remaining ones.