In the above excerpt from Act II Scene 3 of “A Raisin in the Sun” Beneatha reacted to Mr. Lindner in a sarcastic way.
The play deals with the theme of the American Dream. According to this, the people of America hoped for a better living by intermingling with the people of all backgrounds. The family didn't want to confine themselves only to the people of their race. Issues of class and race are prominent in the play. When Linder's statement reveals that he mocks at the people who believe that the Negros should be confined to their own people and community. To such a statement Beneatha reacted sarcastically to her statement.