Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
A. Glycolysis and the oxidation of pyruvate to acetyl CoA
B. Oxidation of pyruvate to acetyl CoA and the citric acid cycle
C. The citric acid cycle and oxidative phosphorylation
D. Oxidative phosphorylation and fermentation
E. Fermentation and glycolysis
Answer: B