Q: 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".
An introduction comes onto the screen for a video about playing tennis. And man comes on to talk about the lessons that he will be teaching in the video. he <sep> (A) shows various examples of the court tennis game that he is participating in. (B) swings the racket several times to demonstrate a good form for swinging the tennis racket. (C) begins by introducing several tennis sanding techniques and how to handle them as a practice tennis player. (D) starts by letting you know when he has finished his tutorial and who and what he teaches.
A:
B