Refer to the Figure Below

Refer to the figure below. A student made this diagram as a study guide for learning the steps involved in the aerobic catabolism of glucose.One step could be added to better illustrate these steps.Which step should be added?

A) A step to show where carbon dioxide is released
B) A step to show where oxygen enters this set of pathways
C) A step to show the molecules that link the citric acid cycle to oxidative phosphorylation
D) A step to show that pyruvate is oxidized to acetyl CoA, the compound that enters the citric acid cycle
E) A step to show that glucose is oxidized to pyruvate during glycolysis