Fermentation reactions:

A. completely oxidize glucose to carbon dioxide and water

B. often require the reactions of glycolysis to provide energy as ATP

C. supply NAD+ for the oxidation of glucose

D. operate in the presence of oxygen

E. two of the above are correct

Option B.

Often require the reactions of glycolysis to produce ATP.

Explanation:

Fermentation is the process whereby one mole of glucose is acted upon by yeast in the absence of oxygen to produce two moles ethanol, two moles of carbondioxide and two moles of ATP. It requires glycolysis to produce ATP.

During glycolysis, one glucose molecules is converted to two pyruvate molecules producing two net ATP and two NADH.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.