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 bare concrete floor is shown. Flooring tools are displayed on a table. a man with a broom and dustpan <sep> (A) , washes the floor. (B) begins to mop the floor. (C) walks away. (D) is cleaning the floor.
A: 
D