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: Two people surf in the ocean on boats equipped with sails . a hand <sep> (A) stands on a diving board and walks underwater. (B) holds a fabric, and then the host separates the two shows off a black cloth. (C) holds ropes from the sail. (D) holds a camera and shows a picture of people as they surf.
Output:
C