Which of the following shows the correct order of events during cellular respiration?
 O
 A. pyruvate oxidation, glycolysis, electron transport, Krebs cycle
 O
 B. glycolysis, Krebs cycle, pyruvate oxidation, electron transport
 O
 C. glycolysis, pyruvate oxidation, Krebs cycle, electron transport
 O
 D. pyruvate oxidation, Krebs cycle, glycolysis, electron transport