【单选题】The main idea of the story is that ________.
A.
) Dorothy, the mother in the house, quarreled with her daughter-in-law and decided to leave and start over
B.
) Dorothy and Tim, as mother and son, overcame a misunderstanding and made up to each other at last
C.
) thinking that she was redundant in the house, Dorothy decided to leave but her son and daughter-in-law convinced her that she was welcome and needed
D.
) Dorothy was worried about her place in the house when her daughter-in-law began to stay at home full time