Please choose the correct ending to complete the given sentence: BMX: An indoor bmx bike race happens. after the start

Ending1: the people go up a ramp in the track with the man in the red jacket. Ending2: , several people are shown riding out on it in the background. Ending3: , everyone goes around the track as quick as possible. Ending4: the spectators sweep past the track and the gates.

Answer format: ending1/ending2/ending3/ending4