Answer:
Well depending on the story, you could have asked all of em, but mostly you should use D) What will the readers reaction be to my story? because if this is a school thing, your teacher is going to be reading 30 of the (most likely) similar or same thing. or A) What was the purpose of my story, and did I achieve that purpose? Is because Teachers use a grading scale and they may use your story as an example to another class on what to do or what not to do, so you may want to be careful.
Explanation:
Your answers are D. The tone is the author's attitude toward a character, subject idea or the writing in general. While the mood is the emotions that we feel when we read a story. ||| A The tone of a story creates the mood. ||| B. The author uses the plot and characteristics of the characters to create the mood.