Write the next sentence in this paragraph:

Once they are both on, he scoots to the grass and someone assists him as he gets up. after he

Available options: (A). is done, he gets back on and he begins lifting up and down again.; (B). is steady, he gets up and goes rollerblading down the sidewalk before coming back and sitting on the pavement.; (C). is fully dressed, the boy skates over and sits on front the camera.; (D). fluffs out the grass, he grabs a hose and begins to exercise.;
(B).