Paleontologists excavate fossils from sedimentary rock. The image illustrates the fossilized structure of limbs and the inferred appearance of extinct species of horse, including, Eohippus, Mesohippus, Merychippus, and Pliohippus compared to the modern horse living today. Which line of evidence is not consistent with the theory of evolution of the horse?

The fossils of the limbs are similar, though not identical, which indicates these organisms are related and evolved from a common ancestor.

The fossils of the limbs are different from each other, which indicates these organisms are not related and evolved separately from each other.

The fossils of the limbs are different because, over time, environmental conditions resulted in the selection of limbs that could support the increased size and weight.

The fossils of the limbs have similar structure and function, which indicates these organisms are related and evolved from a common ancestor.