CORRECT ANSWER ONLY IF YOU KNOW IT!!!!!!!!!!!!!!!!!!!!!!!!
A scientist studying fossils in undisturbed layers of rock identified a species that appeared to have changed little over the years. Which observation would have most likely led him to this conclusion?

A
The simplest fossil organisms appeared only in the newest rocks.

B
No fossil organisms of any kind appeared in the newest rocks.

C
The simplest fossil organisms appeared only in the oldest rocks.

D
The same kind of fossil organisms appeared in old and new rocks.