When CO₂ Levels Are Low and O₂ Levels Are High,photosynthesis

Multiple Choice

When CO₂ levels are low and O₂ levels are high,photosynthesis can be inefficient,because rubisco will add

A) CO₂ to ribulose 1,5-bisphosphate (RuBP) instead of O₂ .
B) O₂ to RuBP instead of CO₂ .
C) CO₂ to O₂ , forming sucrose instead of glucose.
D) CO₂ to a molecule that contains four carbons.