Steps 6 and 7 of glycolysis are catalyzed by the enzymes glyceraldehyde 3-phosphate dehydrogenase and phosphoglycerate kinase, respectively. Together, they ...

A) result in the oxidation of an aldehyde to a carboxylic acid.
B) produce both ATP and NADH.
C) couple the oxidation of a C-H bond to the activation of carrier molecules.
D) catalyze the only glycolytic reactions that create a high-energy phosphate linkage directly from inorganic phosphate.
E) All of the above.