Paragraph 5 supports which of the following about the air that flows through the interior of a Macroternes natalensis mound? A. It has a higher concentration of oxygen in the cellar than in the attic. B. It is the same temperature as the air on the outside of the mound. C. It contains over 250 quarts of oxygen which circulate continuously. D. It is most humid in the cellar and gradually loses moisture as it rises to the attic.