Please choose the correct ending to complete the given sentence: BMX: There are several other bikers doing the same activity on another curved surface. There are five bikers wearing helmets standing ready to start a race. they

Ending1: begin their race on the dirt and the crowd cheers loudly. Ending2: begin to race through the dirt as they do several flips and turns on the little jump bikes riding with their wheels. Ending3: go to the edge of the track. Ending4: begin racing at high speed over a curved road.

Answer format: ending1/ending2/ending3/ending4