Which major event occurred during the Paleozoic era? A. All animals lived on land.

B. People lived on Earth.

C. Pangaea, the huge supercontinent, formed.

D. Flowers first existed on Earth.

Q

Explanation:

Paleozoic Era, also spelled Palaeozoic, major interval of geologic time that began 541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history.

A

Explanation:

This is a because 541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago