Does your car driving licence also permit you to tow a light trailer?

Why this is the correct answer

Yes, the answer is A). The B driving licence always authorises you to tow a light trailer. A "light trailer" is defined as one with a maximum authorised mass (MAM) not exceeding 750 kg. There are no additional weight conditions for towing a light trailer with a B licence — it is always permitted. Important: Do not confuse this with towing heavier (non-light) trailers, where additional rules apply. Option C) "It depends on the weight of the trailer" does NOT apply here, because the question specifically asks about a light trailer, and by definition a light trailer is always within the B licence allowance. For reference, if you wanted to tow a heavier trailer (over 750 kg MAM), the B licence would still allow it provided the combined MAM of the vehicle and trailer does not exceed 3,500 kg. Beyond that, you would need the B96 authorisation (up to 4,250 kg combined) or the B+E licence (above 4,250 kg). But none of these additional rules affect the simple fact that a light trailer can always be towed with a B licence.