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Read MonkeyMan, by Walter Dean Myers
Why does the narrator want to leave Harlem?
A
. He wants to get away from his horrible family.
B
. He wants to open stores across the country.  
C. He wants to escape the gangs and get rich.
D. He wants to visit Africa and find his roots,
Answer: C. He wants to escape the gangs and get rich.
Explanation:
The narrator wants to leave Harlem because he´s scared of the Tigros, who have been terrorizing the neighborhood. 
He dreams of becoming "a doctor and have a nice crib, and a Benz". 
His friend, Fee, claims the narrator has "...black skin and white dreams...".
The narrator´s uncle, Duke, criticizes him for his desire to leave Harlem, highlighting the importance of remembering one´s origins.