A.) just O2B.) just CO2C.) O2 AND CO2D.) you can't cancel out compounds

Answer:
C) O2 and CO2.
Explanation:
The 4 moles of CO2 in equation B cancel entirely out with the 4 moles of CO2 in equation C.
The 6 moles of O2 in equation B cancel entirely out with the 6 moles of O2 in equation C.