Why did people immigrate during the great migration

during the great migration, african americans began to build a new place for themselves in public life, actively confronting racial prejudice as well as economic, political and social challenges to create a black urban culture that would exert enormous influence in the decades to come

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

is there answer chooses?