Which of the Following Statements About the Electron Transport Chain

Which of the following statements about the electron transport chain in cell respiration is CORRECT?

A) The electron transport chain of proteins uses ATP to pump H⁺ across the inner mitochondria membrane against its electrochemical gradient.
B) The electron transport chain of proteins contains pores that are leaky to H⁺.
C) The loss in free energy of the electron initially donated by NADH is used to transport H⁺ across the inner mitochondrial membrane against its electrochemical gradient.
D) Electrons move from NADH to a chain of proteins with lower electronegativities.
E) The ATP synthase generates a H⁺ gradient across the inner mitochondrial membranE.