To me the answer is B because that one doesn't really sound right compared to the other answers.
The storm changes Sydney’s perspective on her life and the things and people around her. Before she only thought of the negatives aspects of her house and doesn’t appreciate has. The storm threatens to take all of that away, which prompts a retrospective moment from Sydney. She realizes that she should be thankful for the house she has and the family that loves her.
More info? What did Percy say about Mrs. Dodds?
The answer would be A. because the story is not about the glass of milk.