Please choose the correct ending to complete the given sentence: BMX: A bike stands on a bumpy unpaved road. people

Ending1: in green t-shirts begin riding the uneven ramps on the ramps as they crash into each other. Ending2: rides bikes very fast in the road and giving high jumps when passing the bumpy part of the road. Ending3: use wrebars, and a crane to lift them over the face of the box. Ending4: are riding sideboards on a dirt path.

Answer format: ending1/ending2/ending3/ending4