I would go with C. Because the narrator is talking. The narrator want to have a lesson badly on water-reading. But Mr. Bixby thinks the narrator is far to advanced for it and will not teach her it. So Mr. Bixby is being stubborn and will not give the lesson.
Answer: the chorus speaks the prologue
Explanation: just like romeo and juliet the prologue not only provides the audience with the background story.
I see the theme by him making up his own life by doing what he do is right not wrong