It is likely that oxygen is present in this system, so that aerobic respiration ... ...

It is likely that oxygen is present in this system, so that aerobic respiration is going on at the same time as fermentation. Taking this into account, which of the following statements is true?
(A) Since oxygen will be used up, using the net change in overall gas production as an indicator of the fermentation rate will be inaccurate.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 04. Cellular Metabolism