This is a test of commonsense with single/multi-choices. Complete the next sentence:

One boy appears in the gym and does his backwards on the elliptical as he does multiple lift ups. as he

Possible answers:
(A). continues, some more people appear and does back flips and one gets off the stage..
(B). is doing them, he concentrates extremely hard on holding his feet up ensuring that he doesn't hit the boxing bag in front of him..
(C). is walking, all but one boy falls and hits his head hard, they all clap as they continue to continue on their routine..
(D). recovers, he goes up to the stand and flips..
The answer is:
(B).