Question

The Cenozoic Era is best described as the era in which

A. multicellular life diversified.

B. a mass extinction event occurred.

C. dinosaurs emerged.

D. mammals began to dominate the land.

Answer 1

I pretty sure it, D) mammals began to dominate the land.

Answer 2

The Cenozoic Era Is best described as (D) the era in which the mammals began to dominate the land.