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".
Input: A male athlete is running on a track. He jumps high into the air. he <sep> (A) is then shown running in slow motion. (B) vaults backwards over a high beam. (C) then dismounts quickly, waving to the crowd. (D) then balances himself before dropping to the ground.
Output:
B