In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

A young man is sitting on a skateboard on the left side of a blue double sided children's slide. the man <sep> (A) ski down the slide and get up on the roller skate board is doing tricks. (B) then grabs the grass and begins to adjust it. (C) then rolls down the slide on his skateboard and when he reaches the end he flies off of the skateboard and fells very hard onto the ground. (D) lit his skateboard with a lighter on it and began skating.
C