Please choose the correct ending to complete the given sentence: Doing motocross: People run motocross on a bumpy road in the wood. A person climbs a bump with a motorcycle. also people

Ending1: climb a rough platform high up. Ending2: stand in a log where a man holds a light throwing it near steep and narrow hill as a guide. Ending3: rides motorcycles on an unpaved flat surface. Ending4: riding horses through road.

Answer format: ending1/ending2/ending3/ending4