Please choose the correct ending to complete the given sentence: BMX: People are standing next to bmx bikes in an indoor field. The guys then mount their bikes behind the start line. all of the guys

Ending1: then race across a track of hills and sharp turns. Ending2: finish and an audience is watching them finish. Ending3: take off their helmets, split down the middle, and start racing. Ending4: begin to dirt bike using their bmx bikes cell phones.

Answer format: ending1/ending2/ending3/ending4