If the Following Two Reactions Were Coupled, What Would Be $\circ$

Multiple Choice

If the following two reactions were coupled, what would be the oxidizing agent for the spontaneous reaction? NAD⁺ + H⁺ + 2e^-
NADH E ^$\circ$ ' = -0.32 V
Acetaldehyde + 2H⁺ + 2e^-
ethanol E ^$\circ$ ' = -0.20 V

A) NAD⁺
B) acetaldehyde
C) NADH
D) ethanol
E) H⁺