Question

The increased migration and increased population that the United States saw during this era are examples of what?
a. nationalism and patriotism
b. social and political changes
c. demographic and environmental changes
d. the appeal of a democratic political system

Answer 1

The increased migration and increased population that the United States saw during (any) era are examples of "c. demographic and environmental changes," since these have to do mainly with population distribution. 

Answer 2

Answer:

The best answer is "C"

demographic and environmental changes

Explanation:

demographic and environmental changes is the main reason for the increased rate of migration and population in the United State during this Era.