50. Glucose labeled with 14C in C-3 and C-4 is completely converted to acetyl-CoA via glycolysis and the pyruvate dehydrogenase complex. What percentage of the acetyl-CoA molecules formed will be labeled with 14C, and in which position of the acetyl moiety will the 14C label be found? (A) 100% of the acetyl-CoA will be labeled at C-1 (carboxyl). (B) 100% of the acetyl-CoA will be labeled at C-2. (C) 50% of the acetyl-CoA will be labeled, all at C-2 (methyl). (D) No label will be found in the acetyl-CoA molecules. (E) Not enough information is given to answer this question.