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PLEASE HELP AND HURRY, WILL GIVE BRAINLIEST AND 30 POINTS TO CORRECT ANSWER.

file:///C:/Users/Bluewhale/Desktop/HSCT_BI13H_12A_stem1_1.jpg

Which organisms are responsible for the majority of the net primary productivity in shallow marine waters?
A. zooplankton
B. phytoplankton
C. bacteria
D. seaweed