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 the answer to Part A 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 quotation reflects Mrs. Van Daan's feelings of neglect and jealousy regarding her son Peter's affection for Anne, indicating her emotional turmoil about their relationship and her desire for attention from Peter.