I would say that the best answer is B. Both women are definitely strong-willed. Dee shows this in her determination to make a new life for herself away from her hometown and famiily - even changing her name in the process - and in how she pushes her mother to get what she wants, specifically the quilt hand-sewn by her grandmother. Her mother shows her strong-will in finally standing up to Dee and telling her she CANNOT have the quilt - that it belongs to her sister Maggie.
Dee left home to go to college, so she has definitely graduated from high school (so the answer cannot be D). While Dee lived at home, she hated her house and was anxious to escape; her mother, by contrast, is happy with her house and where she lives and has no desire to leave her roots or her family (so the answer cannot be A).
As far as C goes, the story does not reveal much about how Dee's mother feels about her country - her love for her family, though, is a different story, and she has many family stories and traditions she holds dear. Dee, as the story shows, has recently discovered a newfound love for her African heritage, even changing her name to show this love for Africa.
During her visit home, Dee is anxious to get some of her mother's possessions so she can show off her love for her "heritage" in her new apartment. This includes the quilt that her mother has promised to her sister - and which Dee had previously thought not good enough for her to take to college. Now she derides her sister, saying she will probably be thoughtless enough to put the quilt to "everyday use." Her arguments, however, fall short when her mother's strong will shows itself: the quilt belongs to Maggie, and Dee cannot have it.