A. The history of life on Earth shows slow and regular change from simple organisms to complex and from low biodiversity to high biodiversity.
B. There have been many mass extinctions over the history of life on Earth.
C. The only mass extinction that has occurred in the history of life is the one that wiped out the dinosaurs.
D. Fossils of fish, reptiles, amphibians, birds, and mammals can be found in rocks of any age and in many locations over the Earth's surface.