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: People ride horses in the shallow waters of the sea. People ride the horses in the water along the shore. a horse <sep> (A) defecates in the water. (B) jumps a rope in the water. (C) stands in the sand in front of the sea blowing wind. (D) is floating on the water.
Output:
A