What happens next in this paragraph?

She demonstrates the technique with his racquet. He then goes into a room, and plays a game of racquetball with a man. they
Available choices:
(A). knock each other down as they play.;
(B). hold hands as they go back and forth.;
(C). hit the ball back and forth against the wall.;
(D). return is at which she discusses what she has learned as the first time around.;
(C).