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: Several men are installing flooring in a large non-residential room. a man <sep> (A) is cleaning something in the window of the room. (B) is welding the ceiling of the room. (C) is using a fork to glue the tiles together using a tool from a large leaf blower. (D) is using a tool to score the floor.
A:
D