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.

The success of "Manifest Destiny" encouraged imperialists' ambitions

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

answer; i believe the two groups were irish immigrants and chinese immigrants;