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

Two boys are on a trampoline doing wrestling moves while a dog watch. one boy

Available choices: a. ducks his head down between the other boys legs while the other boy picks him up by the waist and lift him over his head then slams him on the trampoline.; b. tries to cover himself but ends up landing on the camera.; c. is cast into the flowing water.; d. climbs further up the trampoline.;
a.