In the ocean, plants and other photosynthetic organisms take in carbon. This carbon is transferred through the food web into the depths of the ocean. Large amounts of carbon dioxide from the atmosphere also constantly dissolve into the ocean. Water currents transfer the water containing this carbon dioxide down toward the bottom of the ocean. Which statement is best supported by this information? A.
Oceans are carbon sinks because they emit carbon into the atmosphere.
B.
Oceans are carbon sources because they emit more carbon than they absorb.
C.
Oceans are carbon sinks because they store more carbon than they emit.
D.
Oceans are carbon sources because they absorb carbon from the atmosphere.