Multi-select problem: How does the next paragraph end?

As he is walking, he makes several attempts to cross but falls three times before finally making it to the other side. once

Pick from:
 a). he reaches the other side, he again puts the camera down and starts to walk away before a small picture of him walking in the distance is shown.;
 b). there, he makes his way across the ground and walks around to the other side.;
 c). again, he is successful sitting on top of his blanket and so he continues to ride the stone with the help of a small wooden board.;
 d). to the other side, he tries to turn around and come back but has the hardest time standing up.;
d).