Please choose the correct ending to complete the given sentence: BMX: A young boy is dressed in full protective gear and is standing on his bike as he puts his gloves on and pulls his helmet into place. various clips of different boys all dressed up in their protective bike gear

Ending1: walk up and down the road and perform various tricks and stunts as they surf through the water. Ending2: play as they are all shown riding their bikes very quickly around different tracks. Ending3: on compete bikes as they approach each other. Ending4: are on the screen as they begin to work out or exercises.

Answer format: ending1/ending2/ending3/ending4