Which of the following statements regarding fermentation is correct?
a. glucose consumption is lower in anaerobic conditions (oxygen not present) in comparison to aerobic conditions (oxygen present).
b. fermentation occurs more readily in aerobic conditions (oxygen present) than in anaerobic conditions (oxygen not present).
c. the enzyme alcohol dehydrogenase regenerates nadh for glycolysis.
d. the lactate dehydrogenase reaction regenerates nad+ for glycolysis.