Write the next sentence in the following story.

This is a video of competitive calf roping. one man on horseback

Options:
(a). horses catches a calf and mounts it.
(b). goes after a calf and then stops his horse and ties up the calf.
(c). is working on his calf muscles.
(d). does jump roping on his land in a rodeo arena.. The answer should be
(b).