What role do diatoms play in the global carbon balance affecting global warming?

• A. Diatoms release large amounts of methane, a greenhouse gas, into the atmosphere.
• B. Diatoms release large amounts of carbon dioxide, a greenhouse gas, into the atmosphere.
• C. During a bloom, diatom populations increase rapidly, providing many more photosynthetic organisms to the plankton population.
• D. Diatomaceous earth can be used to filter carbon dioxide from the atmosphere.
• E. During a bloom, diatom populations may increase rapidly. If many diatoms die and sink to the bottom without being eaten, they effectively pump carbon dioxide out of the atmosphere.