The six carbons that form glucose in your food,are effectively lost from the cell as a byproduct

A) both at the oxidation of pyruvate to acetyl CoA, and in the Krebs cycle.
B) during the Krebs cycle as intermediate molecules are rearranged.
C) each time ATP synthase phosphorylates ADP.
D) as pyruvate is oxidized to form acetyl CoA.
E) when the glucose is initially broken apart in glycolysis.