Final answer:
Social Darwinists believed that social reforms interfered with the natural progression of society, and thus should not be implemented.
Step-by-step explanation:
Social Darwinists believed that social reforms should not be implemented because they interfered with the natural progression of society. These proponents of social Darwinism, like British sociologist Herbert Spencer, argued that assisting those who were less competitive in society would lead to the survival of the 'unfit,' and thereby contribute to the decline of human advancement. In their view, allowing natural competition and the struggle for existence would ensure that only the 'fittest' survive, propelling human progress.
Social Darwinism is a theory which posits that certain people are genetically predisposed to succeed, and that the poor, who are considered biologically inferior, are naturally selected to die out. This controversial idea was applied to justify wide-ranging social and political policies including laissez-faire economics and strict class distinctions, leading to condemnation and the eventual disrepute of social Darwinism, especially with the rise of eugenics.
Thus, the correct answer to the student's question is that Social Darwinists believed b. social reforms should not be implemented because they interfered with the natural progression of society.