Given two areas with equal sunlight and available water. Area I has a high amount of atmospheric carbon dioxide while Area II has a low amount of atmospheric carbon dioxide. How does the rate of photosynthesis in Area I compare to that in Area II? A) Atmospheric carbon dioxide has no affect on the rate of photosynthesis. B) The rate of photosynthesis increases with a decrease in carbon dioxide. C) The rate of photosynthesis increases with an increase in carbon dioxide. D) The level of carbon dioxide increases with the level of available oxygen.