Using Dead Diatoms to "Pump" CO₂ to the Seafloor Is

Multiple Choice

Using dead diatoms to "pump" CO₂ to the seafloor is feasible only if dead diatoms sink quickly.Consequently,application of mineral fertilizers,such as iron,should be most effective at times when diatom valves

A) are thickest,and laminarin is being produced rather than oil.
B) are thickest,and oil is being produced rather than laminarin.
C) are thinnest,and laminarin is being produced rather than oil.
D) are thinnest,and oil is being produced rather than laminarin.