What happens next?

Two gymasts are performing in front of a crowd. One is spinning constantly on a beam. the man

Select from:
A). is spinning on the beam as other gyms watch.;
B). cannot keep it upright anymore and has to shuffle up and down an unsteady beam.;
C). is flipping and swinging his head back and forth on the beam.;
D). in red mounts and begins to spin, performing several tricks.;
D).