Why does the author call the Mayan homeland both a "seasonal tropical forest" and "seasonal desert"? A. To illustrate how the climate of the Mayan homeland varied from region to region B. To explain how the climate of the Mayan homeland is similar to that of a jungle or tropical rainforest C. To emphasize the vast size of the area that comprised the Mayan homeland in ancient times D. To make the point that the Mayan homeland is climatically more complex than is generally assumed