Detailed Instructions: 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".
Q: Two men are inside a gym. One is in boxing gloves and the other is wearing arm guards. they <sep> (A) spar with each other, then do some wall wrestling. (B) show off the different moves in punching and kicking. (C) hit a punching bag that doesn't budge. (D) are doing a workout on punching gloves.
A:
B