Walter says that African Americans "don't know how to do nothing but moan, pray, and have babies!" What character(s) in the play have challenged this stereotype?

You might consider Beneatha Younger, the girl George is trying to date. She is Walter's 20-year-old sister, a college student who invades the Younger household with her modern ideas and philosophies on race, class, and religion. She is a handsome intellectual who has worked hard to refine her speech. Ruth Yonger, Walter's wife, of 11 years often bore the responsibility of keeping the household running, in addition to working as a domestic servant.