Why does re-oxidation of FADH₂ via the electron transport chain ultimately produce fewer molecules of ATP than the re-oxidation of NADH?
A. A smaller H⁺ gradient is generated when FADHH₂ is oxidized compared to that generated by the oxidation of NADH.
B. Electrons from NADH do not pass through complex II.
C. Electrons from FADH₂ do not pass through complex II.
D. A larger H⁺ gradient is generated when FADH₂ is oxidized compared to that generated by the oxidation of NADH.