Iron Is Required for Primary Production

Multiple Choice

Iron is required for primary production. Based on this, which of the following can be predicted?

A) Iron fertilization of oceans can raise N₂ in the atmosphere.
B) Iron fertilization of oceans can lower O₂ in the atmosphere.
C) Iron fertilization of oceans can raise CO₂ in the atmosphere.
D) Iron fertilization of oceans can lower CO₂ in the atmosphere.