I believe this is more like an opinion, I would pick D.
It would have to be the variable
Answer:
your answer is 6
Explanation:
C6H12O6 + 6O2 → 6CO2 + ?H2O + Energy
H12O6---> 2 hydrogen and 1 oxygen for very water molecule. 12 ÷ 2= 6 which means 6H2O
Anaerobic respiration is different in plants and animals:
Anaerobic respiration occurs when oxygen is not available and occurs differently in animal and plant cells. In animal cells anaerobic respiration often occurs during exercise. ... It still occurs without oxygen but the glucose molecule is broken down into ethanol, carbon dioxide and a small amount of energy.