If the Calvin Cycle Uses Three Molecules of CO₂ to Produce

Multiple Choice

If the Calvin cycle uses three molecules of CO₂ to produce six molecules of G3P (glyceraldehydes-3-phosphate) , but only one G3P molecule is used to form a carbohydrate molecule, what happens to the other carbons that were taken in?

A) Any unused CO₂ is released into the environment.
B) The other five G3P molecules are used to regenerate more RuBP.
C) Any unused G3P molecule is converted and stored as starch.
D) The remaining five G3P molecules are used to reduce CO₂.