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: A large mat is seen with a bar on top and two people watching on the sides. A man is then seen running in from the side. the man <sep> (A) takes his jacket off and begins beating a bag over and over. (B) jumps over the beam and stands up on the mat. (C) then throws a ball down onto the mat. (D) then performs several more lifts on the bar.
A:
B