Answer:
Imperialism was a cause because building an empire needs manpower such as an army and a navy to conquer and keep the land that they colonised. The alliances system meant that a local conflict could easily result into an intimidating global one.
Explanation:
Answer:
Economic, demographic, and technological changes likewise inspired and shaped antebellum reform. Although America remained predominately a rural and small-town nation into the twentieth century, its cities were growing after 1820.
Explanation:
I THINK ALL OF THEM ARE CORRECT
