Q: 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 is smoothing a substance on a roof with a trowel. He moves quickly to smooth out dents. the man <sep> (A) moves to the bottom and smooths back up the top. (B) stains the roof with the substance. (C) blows on a container of lighter fluid. (D) uses a tool to hold the roof up.
A:
A