Answer;
The geographic events during mesozoic Era;
-formation of the Rocky Mountains begins
-Innuitian Mountains formed
-shallow seas in the interior of North America at times
Explanation;
-This Era is the second of Earth’s three major geologic eras of Phanerozoic time.
-Mesozoic Era began 252.2 million years ago, following the conclusion of the Paleozoic Era, and ended 66 million years ago, at the dawn of the Cenozoic Era.
D) Complex Carbohydrates I'm sure this is the answer