How Did the Great Migrations of the 1800s Alter American

How did the great migrations of the 1800s alter American societies?

A) South America became more European while the United States became more diverse.
B) South America became more English while the United States became more Spanish.
C) South America experienced a tremendous population surge as Catholics left the United States in record numbers.
D) The Americas experienced population decline as many people returned to Europe to enjoy the fruits of industrialization.