What is the most logical next event?

Several swimmers idle in a pool in a line while an audience watches. the swimmers

Choose from: A. all swim over and practice on an elliptical.; B. enter the pool and compete in a sport where one player makes several hits directly at the net.; C. reach the bottom of the ladder and cheer each other.; D. swim towards the middle of the pool in unison as the camera pans to reveal more swimmers approaching from the other direction.;
D.