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 boy and girl in a karate uniform <sep> (A) come running down a street. (B) are playing in front of a camera. (C) attack each other in a karate park on a playground in a concrete ring. (D) gently glide down a long middle with their great opens arm extended and then taunt and then duck and then advance while doing their karate routine in an upward motion.
B