Answer:
The passage that contributes to the setting of the story in Stephen Crane's "A Great Mistake" is B. Elevated trains thundered to the station and the stairway poured people upon the sidewalks.
Step-by-step explanation:
This sentence provides the reader with the sense of a busy and bustling city environment, which sets the stage for the events that follow in the story. It also highlights the significance of the location and how it shapes the events of the story.