What happens next?

A person riding a horse chases after a bull. the person

Choose your answer from: (I) is caught several times by the bull.. (II) chase and chase the bull, then the person chase after the bull and chase others.. (III) lassoes the bull, get off his horse, ties its legs, and another person goes to the tied up bull.. (IV) chases him down and knocks the bull down..
(III)