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