It's C. because she met the teachers and staff and at the end of the story she says she might use them for another story later. For Part B its A. Like I mentioned before she met the teachers and staff and hinted she will use them for future stories. By the way, I took the test. Hope this helps!
Contrast is the correct answer. A character foil is a character who acts as a contrast by highlighting one of another character's qualities. I hope this will help you! Have a wonderful day!