Answer: D. Social Darwinism
Explanation: Social Darwinism emerged at the end of the 19th and the beginning of the 20th century, and it was the opposition to social reforms. According to Darwin's theory of evolution, only the most capable individuals in the animal world can survive and continue their species, the advocates of Social Darwinism have applied this selection to social groups. These were the ones who owned wealth, capital, and were against social reforms that would have meant better working and living conditions for a wider number of people, not just for them. In this they did not see their interest, all those who already had a far more privileged status, and by oppressing social reforms tried to maintain imperialism and conservatism that guaranteed their status.