The Existence of Evolutionary Trends,such as Increasing Body Sizes Among

The existence of evolutionary trends,such as increasing body sizes among horse species,is evidence that

A) a larger volume-to-surface area ratio is beneficial to all mammals.
B) larger animals are better adapted than smaller ones.
C) evolution always tends toward increased complexity or increased size.
D) in particular environments, similar adaptations can be beneficial in more than one species.
E) evolution generally progresses toward some predetermined goal.