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".
Input: She later demonstrates how to remove the saddle off. She puts the new one on and then uses tools to tighten it back on. she <sep> (A) sits down on her horse and pulls out tools to apply the saddle to the back of the horse. (B) speaks to another woman while marking her cheeks while showing off. (C) puts the new one onto the horse's hind legs and allows the rear legs to dangle over the pommel. (D) uses a screwdriver to tighten the screws and adjust the level.
Output:
D