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: Two little girls are playing in an outdoors park. They kick a ball back and forth to each other. they <sep> (A) hold each demonstration for three people sitting on a bench. (B) slide down a slide, and then into a pool. (C) use poles to keep themselves upright. (D) hop and run after the ball.
A:
D