4.What do we know about Mary Cassatt’s marriage? () A: Her marriage failed because she never gave a thought to her husband<br/>and family. B: She never married because she did not want to be just a wife and<br/>mother. C: After marriage she decided to give up her husband rather than her<br/>career. D: She did not marry because for a lady of her social position to marry<br/>below her was unthinkable.