Question

which of the following occurred just before the current era?
a. mesozoic
b. cenozoic
c. paleozoic
d. precambrian

Explanation:

The current era is the Cenozoic. The Mesozoic era (the age of dinosaurs) occurred just before the Cenozoic. The Paleozoic is earlier than the Mesozoic, and the Precambrian is the earliest major time period. So the era just before the current (Cenozoic) era is the Mesozoic.

Answer:

A. Mesozoic