Early Evolutionary Theorists Were Captivated by the Idea That Ontogeny

Early evolutionary theorists were captivated by the idea that ontogeny recapitulates phylogeny. This idea
Means that

A) there is no qualitative difference between animal and human consciousness.
B) all change is gradual.
C) the offspring will always resemble the parents.
D) each individual goes through the developmental stages that characterize the history of the race.