Please choose the correct ending to complete the given sentence: BMX: . several bicycle racers dressed in motocross suits and wearing helmets

Ending1: wander around a trails, acodea and down an alley with a trip sign attached to a bike. Ending2: are lined up at the start line, waiting to race. Ending3: talk about high dirt bike safety instructions before riding through heavy dirt and into a parking lot. Ending4: keep going down the track after one another, sometimes individually.

Answer format: ending1/ending2/ending3/ending4