The correct answer here is the option B.
Social- Darwinism is a term that encompasses numerous philosophies and thinkers that use the theory of evolution and the natural selection concept and apply it to the society as a whole. The social-Darwinist argument in the US revolved around the claim that, United States, as a dominant and both culturally, military and economically superior force was obliged to govern less advanced nations so they too can prosper as the United States did.
