In what ways were civilizations in early Mesoamerica and South America complex?

Many young people traveled by train out of the midwest in search of new opportunities during the 1930s. what term is used to describe their actions

Can someone me out with this , i'm putting 30 points on it

The plantation economy in the south produced a. equal opportunity for all whites and no illiteracy. b. low profits despite the enslavement of a great number of people. c. great profits and developed great educational institutions. d. great profits at the expense of cultural development and equal opportunity.