The correct answer is B. The central idea in "A Raisin in the Sun" is heritage.
The story is about an African-American family that recives ten thousand dollars from the father's insurance policy. During the play, the family argues about what to do with the money.
The mother wants to buy a house and the brother wants to invest in a liquor store. But the daughter, Beneatha, wants to use it to pay her tuiton for medical school, and wishes her family did not want to enter the white world so much. She wants to look back to life in Africa to connect with her heritage and find her identity.