You will be given a definition of a task first, then some input of the task.
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 man is seen speaking to the camera while holding a racket and men standing behind him. the man <sep> (A) then demonstrates how to hit the ball over a net while still speaking to the camera. (B) then begins hitting a ball and it knocks down several pins around him. (C) then hits the ball throughout the room while the men play tennis. (D) then hits a ball on the ground and begins running down a track.
Output:
A