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A
B
C
D
E
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A) to then be used in the reactions that turn carbon dioxide into organic compounds
B) which are then used in the reactions that turn carbon dioxide into organic compounds
C) which are then used in the reactions, turning carbon dioxide into organic compounds
D) then used in the reactions that turn carbon dioxide into organic compounds
E) which the reactions that turn carbon dioxide into organic compounds then use
OA B
Source: Economist GMAT













