a scientist observes fossil evidence that leads her to believe that certain organisms have a common…

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? she observed older fossils that contained many of the same minerals as the newer ones. she found skeletons of modern organisms in the same area as fossilized organisms. she observed a fossil with skeletal structures similar to certain modern organisms. she found several fossils in rock layers directly below other fossils of similar size.
Answer
Brief Explanations:
Similar skeletal structures in fossils and modern - day organisms can indicate a common ancestor. Minerals in fossils don't directly show common ancestry. Finding modern organism skeletons near fossils isn't conclusive. Fossil size and layer position don't imply common ancestry.
Answer:
She observed a fossil with skeletal structures similar to certain modern organisms.