During the Mesozoic Era which of the following events happened. Only one is correct! A ...The super continents Gondwanaland and Laurasia collided some time back to form a single super-super continent called Pangea
B...Huge forests and swamp lands formed during the warm climate of the Mississippian and Pennsylvanian periods. These swamps later fossilized into the giant coal beds of the eastern United States
Cwhales took over the oceans, saber-tooth cats shared the land with elephants and giant sloths, and humans finally appeared.
D...The Earth and Moon formed and cooled into solid spheres.