You will be given a definition of a task first, then some input of the task.
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 young boy is sitting outdoors on a wooden bench and drumming on a drum set that is made out of steel plates, cans and pots. a man <sep> (A) just walked past him while the boy was drumming loudly. (B) stands over him listening to him play. (C) walks down the sidewalk behind the boy. (D) is sweeping next to him while he plays the drums.
Output:
A