Which of the Following Characteristics Distinguish Darwin's Theory from Earlier

Which of the following characteristics distinguish Darwin's theory from earlier explanations of biological diversity and adaptive traits?

A) Darwin provided purely spiritual, rather than physical, explanations for the origins of biological diversity.
B) Darwin recognized that evolutionary change occurs in groups of organisms rather than in individuals: some members of a group survive and reproduce more successfully than others.
C) Darwin described evolution as a single-stage process: variations arise within groups, natural selection eliminates unsuccessful variations, and the next generation inherits successful variations.
D) Like Lamarck, Darwin understood that evolution does not occur because some organisms function worse than others in a particular environment.