Question

Why might the closing of the frontier have encouraged American imperialism?

a. Discontented Americans sought a new territory in which to try their luck.
b. The success of “Manifest Destiny” encouraged imperialists’ ambitions.
c. The rising American population needed more room to expand.
d. Social Darwinism called for displaced Native Americans to be resettled abroad.

Answer 1

The success of "Manifest Destiny" encouraged imperialists' ambitions