Crossing a level crossing must be done...
A)very quickly so as not to coincide with the train.
B)very slowly and with the low beam on so that the train driver can see us.
C)without delay and after verifying that there is no risk of being stopped on the train tracks.Correct
# Explanation: Crossing a Level Crossing
When crossing a level crossing, you must do so **without delay** but only after verifying that your vehicle will be able to cross completely without getting stuck on the tracks. The fundamental thing is never to stop on the train tracks, as this is extremely dangerous. The appropriate speed is normal driving speed, neither too fast nor too slow.