In Chesnutt's "The Goophered Grapevine," how does the frame story add to our understanding of the main storys message?
It shows that African Americans often exploit the fact that others assume they are not intelligent.
It demonstrates that Northerners do not belong in the South because grapes grow differently in the two regions.
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It demonstrates that African Americans and Northerners are easily frightened by ghost stories.
It shows that Northerners are not observant when it comes to short visits to the South.