Authors introduce the characters and set the scene during the part of the story called a. resolution b. exposition c. turning point d. falling action

To better understand the story and the characters in it, the author would opt to introduce them and the set at the very first part of the story which is called the exposition. Thus, the answer is letter B. This contains the history on how the story began. 

I believe the answer would be either B since they are proposing an example afterwords or C