What minimal distance should be kept between columns of mopeds?

This question is about the minimum distance between columns of mopeds. It should be at least 200 m - answer B.

The Road Traffic Act states that the distance between moving columns must not be less than 500 m for columns of motor vehicles and 200 m for columns of other vehicles. A moped is not a motor vehicle, because the Act excludes it from the term power-driven vehicle, so 200 m applies to columns of mopeds. The value of 500 m (answer C) applies to columns of cars, and 100 m (answer A) is too little. The gap between columns allows other drivers to overtake them in stages and return safely to their lane. Also remember that no more than 10 mopeds may ride in one organised column.

Legal basis: Art. 32 para. 1 point 1 and para. 2 and Art. 2 point 32 and 33 of the Road Traffic Act (Prawo o ruchu drogowym)