During the Citric Acid Cycle, Energy Stored in Acetyl CoA $\to$

During the citric acid cycle, energy stored in acetyl CoA is used to

A) create a proton gradient.
B) drive the reaction ADP + P_i $\to$ ATP.
C) reduce NAD⁺ to NADH.
D) drive the reaction oxaloacetate $\to$ citric acid.
E) reduce FAD to FADH₂.