Question

What conditions allowed so many different kinds of mammals to

evolve during the Cenozoic Era?

A. Grasses evolved providing food to larger grazing animals, no dinosaurs which made way for mammals
B. Overpopulation of ocean algae allowed for more fish to thrive following more species of fish to exist
C. No dinosaurs so mammals were forced to evolve or die
D. More macrobiotic organisms caused the evolution process to happen at a quicker rate

Answer 1

A. Grasses evolved providing food to larger grazing animals, no dinosaurs which made way for mammals