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 group of people are running around inside a gym. They are doing various cheerleading routines. they <sep> (A) are acting silly, riding each other for the camera. (B) are performing front and center. (C) are also doing arm flips. (D) are moving side to side over trampolines.
A:
A