Which of the following can be inferred from paragraph 1 about pollen production? A. Pollen production requires a significant investment of energy and resources on the part of the plant. B. The capacity to produce pollen in large quantities is a recent development in the evolutionary history of plants. C. Plants in the tropics generally produce more pollen than those in temperate zones. D. The highest levels of pollen production are found in plants that depend on insects or birds to carry their pollen.