What Idea Formed the Core of Reform Darwinist Theory in Progressive-Era

Multiple Choice

What idea formed the core of reform Darwinist theory in progressive-era America?

A) People are powerless in the face of the law of natural selection.
B) Laissez-faire is the most effective means of solving society's problems.
C) Reform should always be a slow and thoughtful process.
D) The state should play a more active role in solving social problems.