What is carbon fixation, and how does it relate to photosynthesis?
A. It is the absorption of CO2 from the air, and it occurs during the light-dependent reactions.
B. It is the reduction of CO2, and it occurs during the Calvin cycle.
C. It is the conversion of CO2 into organic compounds, and it forms 3-PGA.
D. It is the production of CO2 during regeneration, and it forms RuBP.