Which of the following is a compensation point:

• A. Leaves respire and utilize O2 and release CO2.
• B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
• C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
• D. Rate of respiration becomes more than rate of photosynthesis.