Notice in the image of the plant that both oxygen and carbon dioxide enter and exit the plant. Using what you know about photosynthesis and cellular respiration, explain what is happening with regard to these two gases.

A) Unlike animals, plants use carbon dioxide in cellular respiration and produce oxygen.
B) Plants, as autotrophs, only undergo photosynthesis and both use and produce oxygen and carbon dioxide in this process.
C) Plants require oxygen for photosynthesis and produce carbon dioxide. Plants then use the carbon dioxide produced in cellular respiration, releasing oxygen as a byproduct.
D) Plants require carbon dioxide for photosynthesis and produce oxygen as a byproduct. Plants then use the oxygen released in cellular respiration, producing carbon dioxide as a byproduct.