The paleozoic era lasted from 544 to 245 million years ago.
This era can be divided in 6 periods.
- The Cambrian period, 544 - 505 million years ago.
- The ordovician period, 505 - 440 million years ago.
- The silurian period, 440 - 410 million years ago.
- The devonian period, 410 - 360 million years ago.
- The Carboniferous period, 360 - 290 million years ago.
- The Permian period, 290 - 245 million years ago
During the last period, the Permian period, all land masses collided and formed a supercontinent. This supercontinent was named Pangea.
The correct option is option D.