You are holding a driving permit class C. Your truck has the following specifications: - empty mass 9000 kg - permissible total mass 18000 kg - permissible towed load 22000 kg Which trailer are you allowed to tow?

With a class C driving permit you may drive a truck with a permissible total mass over 3.5 t, but trailer rules are restrictive. Class C on its own only allows you to tow a “light trailer” with a permissible total mass up to 750 kg.

That’s why answer 1 (750 kg) is correct. Even though your truck is technically approved to tow much more (permissible towed load 22,000 kg), your driving licence category is the limiting factor in this question, not the vehicle’s capability.

To tow a trailer with 18,000 kg or 22,000 kg permissible total mass, you would generally need class CE (truck + heavy trailer). Rule of thumb: C = truck, only small trailer up to 750 kg; CE = truck with heavier trailers.