Study the geologic time scale:

- 4.600 MYA to 544 MYA: Precambrian Time
- 544 MYA to 250 MYA: Paleozoic Era
- 250 MYA to 65 MYA: Mesozoic Era
- 65 MYA to Today: Cenozoic Era

The Eocene period exists in Earth's history around 34 MYA.

What could a scientist do to determine what era the Eocene period belongs to on the geologic time scale?

A. Learn what happened during Precambrian time.