Which question would most likely be answered by reading the exposition of a story? a. where was the author born b. what kind of story is this ? c. what is the main conflict? d. what is the story's theme?

The best answer for this question would be: B. What kind of story is this? Upon reading an exposition, it reveals the purpose or the main plot of the story. Readers will be able to follow the kind of story that they will be reading.

I believe the answer is: B. What kind of story is this ? 

The exposition of a certain story would be filled with explanation of an idea or theory that the writer had when he/she started writing.
By reading the exposition, the readers can grasp the general concept of the writer's idea and would understand what's the story is about.