In 2010 scientists excavated a skull fossil that provides evidence of a newly discovered species of big cat. Scientists hypothesize that big cats branched off from smaller wild cats about 6 million years ago. Which of these resources did the scientists most likely rely on to form their hypothesis?
answer choices
a food web showing feeding relationships of organisms where the fossil skull was found
population and migration data for small wild cats living in the ecosystem where the skull was found
the fossil record and DNA comparisons of big cats and small cats
the historical record of interactions between different species of big cats