Scientists compare a fossil of a species that lived 5,000 years ago with members of the same species today. They notice there are several differences between the two. What most likely can be said about the environment and the species? A.
The environment changed significantly, but the species did not change.

B.
The environment changed significantly, causing the species to change over time.

C.
The environment did not change significantly, and the species developed new mating habits.

D.
The environment did not change significantly, but the species changed over time.