What is the most logical next event?

A man in an athletic outfit and a paper number pinned to his chest paces on a sports field. the man

Available choices: [i] takes off running after the ball and throws it onto the field. [ii] demonstrates using a long string to crawl across a hilly and rocky track, and holding the string to point out obstacles. [iii] begins to push against another man wearing the yellow fitness clothing. [iv] runs a distance and performs a long jump.
[iv]