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".
Q: A man cleaning a shoe that's sitting on a black mat in front of him. he <sep> (A) sinks the vacuum into the sole. (B) picks up the shoe and more people appear and begin to pick up the shoe to show what's inside it while the information on the bottom of the screen is scrolling. (C) scratches his chin as he wipes the shoe with a towel. (D) scrubs the shoe with a brush.
A:
D