Please choose the correct ending to complete the given sentence: BMX: . several shots of riders standing around a sand pit

Ending1: are shown followed by many angles of people riding bikes over jumps. Ending2: are shown with one getting down and running about. Ending3: are shown walking down the road. Ending4: are shown as well as riding into the area and throwing rocks into the pit.

Answer format: ending1/ending2/ending3/ending4