What is the result of deep-sea organisms playing a key role in the functioning of the biological carbon pump?

Options

A. Phytoplankton, at the bottom of the marine food chain, use CO2 and transform it into organic matter, part
of which sinks to the ocean floor.
B. Earth receives half of its oxygen due to the activities of these organisms
C. The level of plastic pollution increases in the water bodies
D. These organisms die from shock and severe trauma