Probably B) strenuous exercise. If not B then it's probably A. I don't know for sure though
I'm not sure about the first two but I think the one about the halite crystal is cubic. :)
The correct answer is C. Fermentation makes NAD+ needed to keep glycolysis going. The other options are inaccruate since:
for A: there are types of fermentation that does not produce carbon dioxide like Lactic acid fermentation
for B: many types of fermentation only occurs in the absence of oxygen (anaerobic process)
for B: respiration produces around 36 ATP while fermentation only generates around 2 ATP
B???????????????????????????????????????
