D) To fight the spread of communism.
Because of the Domino Theory they thought that if Vietnam fell into Communism, the whole region would follow. So therefore they wanted to support South Vietnam in order to contain Communism in Asia.
I believe the answer is all of above
People who categorize themselves as anti-imperialists often state that they are opposed to colonialism, colonial empires, hegemony, imperialism and the territorial expansion of a country beyond its established borders.
<h3>What is imperialist behavior?</h3>
Imperialism is the state policy, practice, or advocacy of extending power and dominion, especially by direct territorial acquisition or by gaining political and economic control of other areas, often through employing hard power, especially military force, but also soft power.
<h3>What did the anti imperialist believe?</h3>
Although diverse in motives and party affiliation, the anti-imperialists shared common fears and beliefs.
They were convinced that imperialism threatened the ideals and institutions of their own country, and many believed that it was unjust to dictate the political goals and institutions of foreign peoples.
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The answer is D, the 12 month calendar.