Given the task definition and input, reply with output. 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".

There is a group of korean pop singers performing on a stage. one of the singers <sep> (A) stretches before his performance. (B) is doing a routine on a black pit stage. (C) gets to the stage first and begins singing is of his high country. (D) is playing the violin while the audience cheers and claps for him.
D