Hey we just read that too! How Mr. Frank says "no more" because he can't bare to remember his horrid past by reading his diary. In the first scene, he finds the diary and starts reading it. In scene 5, Mr. Frank finishes the book.
I picked A because, you first have to find out what you wanna write about. This is something you should before finding the main points to put in your story, and your main idea. It can be about something you like, or something that makes your story interesting to read. Hope this helps!!!
The supply were the hufflepuff trees and the demand were the peoples wanting for the trees