A scientist observes fossil evidence that leads her to believe that certain organisms have a common ancestor.Which observation most likely led to this conclusion?
A
She observed older fossils that contained many of the same minerals as the newer ones.B
She found skeletons of modern organisms in the same area as fossilized organisms.C
She observed a fossil with skeletal structures similar to certain modern organisms.D
She found several fossils in rock layers directly below other fossils of similar size.