Definition: 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".
Input: A shirtless man is standing on a playground. he <sep> (A) swings down a slide, then a set of stairs. (B) holds a pole, then rides down the slide. (C) uses a ladder to rig up speed on the swings. (D) uses the equipment to do balance exercises.
Output:
D