WILL GIVE BRAINLIEST!!!!!! Which statement about undisturbed layers of sedimentary rock is true? A. The thickest rock is on top and the thinnest is on the bottom. B. The thinnest rock is on top and the thickest is on the bottom. C. The youngest rock is on top and the oldest is on the bottom. D. The oldest rock is on top and the youngest is on the bottom.