Use the diagram below to answer the question. The diagram shows undisturbed sedimentary strata at the bottom of an ocean. (AKS 4d)

The fossils found in Layer X resemble the fossils found in Layer W. This similarity suggests that…

A.
The fossils in Layer W must be less complex than those in Layer X.

B.
Vertebrate fossils are only found in sediments underneath the ocean.

C.
Modern forms of life may have changed from earlier forms of life.

D.
The fossils in layer W were formed before the fossils in Layer X.