Part A: The correct answer is D. She is jealous that Peter is showing affection to someone else.
Part B: The quotation that best supports this answer is B. I don’t know what good it is to have a son. I never see him. He wouldn’t care if I killed myself.
This quote reflects Mrs. Van Daan's feelings of neglect and highlights her jealousy regarding Anne's relationship with Peter, as it indicates her concern about losing Peter's attention.