A. It is not true in fact to say that all animals are adopted. | B. If an animal wasn't well-adapted to its environment it wouldn't be there to be inspected. | ||
C. Animals and plants get to be adapted to their environment through evolution - no need to invoke God. | D. Animals and plants are no more adapted to their environment than watches. | ||
B, surely.
C is wrong because the theory of evolution through natural selection is only propounded later (by Darwin and Wallace)
D is weird; A is worse.