Please choose the correct ending to complete the given sentence: Doing motocross: Man is riding a motorbike in a dusty path inside a dome. Motorbikes are riding bikes doing motocross in a field inside a dome. people

Ending1: are standing in the parking lot playing with the bikes. Ending2: are in bikes in a competition. Ending3: are skateboarding in the desert. Ending4: are shaving little kids with the help of a man in a black tricycle in a grass covered area.

Answer format: ending1/ending2/ending3/ending4