Mammals Began a Dramatic Expansion in The

Question

Mammals began a dramatic expansion in the
A)Pleistocene.
B)Paleocene.
C)Oligocene.
D)Triassic.
E)Eocene.

Accepted Answer

The Eocene epoch, which occurred approximately 56 to 33.9 million years ago, is known as the "age of mammals" due to the dramatic expansion of mammalian life forms during this time.