Which of the following accurately describes the distribution of dissolved carbon dioxide gas in the ocean? A. Carbon dioxide levels are lowest at the ocean surface, where it's produced through decomposition.
B. Carbon dioxide levels are highest at the ocean surface, where it's produced through photosynthesis.
C. Carbon dioxide concentrations increase with depth due to less uptake and decomposition of organic matter at depth.
D. Carbon dioxide concentrations decrease with depth due to more uptake and decomposition of organic matter at depth.