There is some carbon released during cellular respiration as carbon dioxide <span>C6H12O6 + 6O2 = 6CO2 + 6H2O + 36 or 38 ATP but there is so much more released when the plant dies and rots that I think the answer they want is C.</span>
C. is the correct answer and BTW I don't know if it was U or not there was a question about when the carbon is realised from non living to living environment the answer to that question would be photosynthesis
