Answer:
it had lost significant territory to other European states in the nineteenth century.
Explanation:
The answer is D. Contrasts with the Soviet Union developed and in 1959 they moved toward becoming rivals in the global framework offering two unique models of socialism. China was seen by progressive US presidents from Dwight Eisenhower to Lyndon Johnson as a feature of the more extensive 'communist threat'; a view fortified by China's procurement of atomic weapons in 1964. China's contribution in the Korean War (1950– 1953) set Chinese troops specifically against US powers and their partners, bringing about a stalemate that kept on isolating North and South Korea well into the twenty-first century.
American settlers continue to spread to the west and took land from Native Americans. As expansion continued, agreements were signed and they were broken with native americans losing their homes and land and force to move west. As Native Americans were forced to more to the west, they are not able to adopt to the environment they are moving to, so they died due to lack of food or diseases.