5. The Cenozoic Era extended over which of the following time periods in the fossil record? A. the Paleozoic Era, from the start of the Cambrian into the Permian Period B. the "age of reptiles", from...

Extracted text: 5. The Cenozoic Era extended over which of the following time periods in the fossil record? A. the Paleozoic Era, from the start of the Cambrian into the Permian Period B. the "age of reptiles", from 251 million years ago to 65 million years ago C. the "age of birds and mammals", from 65 million years ago to the present day D. the "age of fishes", from 542 million years ago to 251 million years ago E. the Mesozoic Era, from the start of the Triassic into the Cretaceous Period