Why Does NADH Produce More Energy Than FADH₂

Multiple Choice

Why does NADH produce more energy than FADH₂?

A) FADH₂donates electrons to protein complex III as opposed to complex II.
B) FADH₂requires more ATP to produce it and gives more energy back.
C) NADH and FADH₂are synthesized in different steps of cellular respiration.
D) NADH has a high free energy and can be oxidized more readily than FADH₂.
E) NADH supplies fewer electrons that are of a higher energy state than FADH₂.