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: A boy is standing in a residence and is playing the bagpipe. when he <sep> (A) is done, he hands it over to the man who picks it up very graciously and dances. (B) 's finished he pulls the instrument from his mouth. (C) is done playing he gets down and walks away. (D) finishes his tune, a young boy walks into view wearing a green baseball cap.
A:
B