Multi-choice problem: Continue writing the next sentence in this paragraph:

Several athletes are gathered inside a fenced area. One walks to the circle in the center. she

Available options:
(I) throws a ball from one end of the circle to the other.;
(II) jumps onto the circle and jumps over it several times.;
(III) spins in circles, then lets go of the ball before the others join in to measure the distance.;
(IV) spins several times and jumps into the circle.;
(III)