Given the task definition and input, reply with output. 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 woman is seen speaking to the camera while pointing to an exercise bike. sh <sep> (A) men are seen installing grips around the bike's tire and then screwing in the tire. (B) it shows the man working out on the machine. (C) is shown preparing the machine and begins riding towards the camera. (D) adjusts the settings on the bike and climbs on top to begin riding.
D