The correct answer is "D".
There was a wave of "Anti Imperialism" who emerged in America during 1898. After defeating the Spanish in the Wars for territories such as Cuba, Guam, The Philippines and Cuba, Americans, instead of letting those territories decide their political faith, decided they would exercise control over them, managing their economic activities. This was seen by many "Anti Imperialists" as something that did not represent the Constitution of the United States.
The cold war was a state of geopolitical tensions after world war 2 between powers in the eastern bloc (ussr and it's satellite states) and powers in the western bloc (usa, nato allies and others). The major disagreement in the cold war was due to the usa and ussr nuclear arms race.
Because they wanted to see what the other people would do
Socialism is a political movement which evolved in the Soviet Union of the time. Socialism and communism as ideologies and ideas were developed by Marx, Engels, and also Lenin in part later on, already in the 20th century.
B. Farms became fewer but more efficient
