How might an increase in global temperatures affect the photosynthesis and growth of C3 plants?

• A. It may increase photosynthesis efficiency by enhancing RuBisCO activity.
• B. It may increase growth by providing more light energy for photosynthesis.
• C. It may decrease photosynthesis efficiency due to increased photorespiration.
• D. It may have no effect on photosynthesis and growth.

Answer: (C)