For the Following Questions, Compare the Light Reactions with the Calvin

For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants.
-In the process of carbon fixation, RuBP attaches a CO₂ to produce a 6 carbon molecule, which is then split in two. After phosphorylation and reduction, what more needs to happen in the Calvin cycle?

A) addition of a pair of electrons from NADPH
B) inactivation of RuBP carboxylase enzyme
C) regeneration of ATP from ADP
D) regeneration of rubisco
E) a gain of NADPH