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".

A man in glasses speaks to the camera. A guy holding onto a rope attached to a boat water skiis. the man in the glasses <sep> (A) begins to explain the filming environment and the fish swimming under people. (B) is seen sitting on a board with his feet up in the water. (C) appears again, speaking to the camera and points to a man water skiing on the river. (D) is going over the water movements.
C