Which of the following is NOT correct with respect to the redox pair NAD⁺/NADH?

A) The nicotinamide ring is a relatively stable aromatic structure.
B) The nicotinamide ring is a heteroaromatic because it has a noncarbon atom in position 4.
C) The nicotinamide ring may accept two electrons at carbon 1, becoming a nonaromatic ring.
D) The reduced, nonaromatic ring of NADH is at a higher energy than the aromatic ring of NAD+.
E) NADH can accept electrons from an electron transport system.