Please choose the correct ending to complete the given sentence: BMX: A group of dirt bikers are prepared at the gate. The gate opens, and they take off. they

Ending1: go down a hill in a race car over rocks and trees in the race track. Ending2: go roaring over turbulent water, flipping over large rocks. Ending3: go down a hill and across a course of dirt. Ending4: go over hills and around curves trying to win the race.

Answer format: ending1/ending2/ending3/ending4