The Figure Below Shows the Net Primary Productivity (NPP) in Terrestrial

The figure below shows the net primary productivity (NPP) in terrestrial and marine biomes around the world.
The pattern of NPP in marine ecosystems as shown above suggests that

A) marine productivity is as sensitive to temperature as terrestrial productivity.
B) without shade from overhead vegetation, marine productivity typically exceeds that found in terrestrial ecosystems.
C) marine ecosystems are also limited by sunlight, with the highest productivity at the equator.
D) most marine productivity results from the input of terrestrially derived nutrients.

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