Answer:
C. evidence of ancient tropical swamps in cold regions of North America
Step-by-step explanation:
The crucial point for the development of the Continental Drift theory, which in its essence means the movement of continents, or moving plates, is the realization that the earth is not static. Then Wegener realized that the coast of Africa was contoured to fit the coast of South America. In addition, he found evidence of ancient tropical exchanges in cold North American regions.
Another trace that supports the theory was the discovery of fossils of animals of the same species on different continents, as it would be impossible for these animals to have crossed the Atlantic Ocean, the only explanation being that in the past the two continents were together.