The City of Chicago Experienced Rapid Immigration from Europe and In-Migration

The city of Chicago experienced rapid immigration from Europe and in-migration from the American South, as a result of

A) social policies that encouraged movement away from the coasts and toward the heartland.
B) fears of political persecution among refugees.
C) Chicago's plea for more people to work in its factories.
D) Al Capone's promise of economic opportunity for all who would move there.