She challenges African-American stereotypes by presenting the characters as exaggerated caricatures of the stereotypes American society places on black people.
We can arrive at this answer because:
Hansberry wanted to expose the way blacks were seen and treated in the country.
For this reason, she places black people as the main characters and the center of the narrative.
However, it reinforces the stereotypes that the American population has about black people.
These stereotypes are presented by the characters in an exaggerated way, highlighting how these stereotypes harm the coexistence and experiences of the characters.
An example of this is the fact that the characters believe they must work hard to achieve success, something that only creates frustrations and is far from reality.
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