What happens next?

Several blocks fall, forming a black and white picture of two girls. The girls are shown in a gymnasium. one

Options are: (a). of the girls matches herself up to the other, and feet together.; (b). does several back flips, then a group begins throwing girls into the air, practicing flips.; (c). girl runs from one end of the gym to the other, throwing all of her weight to the other end.; (d). climbs up a wall while the other follows.;
(b).