Mashaal Masha
Photosynthesis, the mechanism by which plants use sunlight to turn carbon dioxide and water into ________ is fueled in part by an enzyme called Photosystem II that harvests energy-giving electrons from water molecules.

Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Medium
A: 

nutrients

B: 

nutrients and

C: 

nutrients,

D: 

nutrients--

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