A) will become acidic inside the vesicles when NADH is added.
B) will become alkaline inside the vesicles when NADH is added.
C) will make ATP from ADP and

ᵢ if transferred to a pH 4 buffered solution after incubation in a pH 7 buffered solution.
D) will hydrolyze ATP to pump protons out of the interior of the vesicle to the exterior.
E) will reverse electron flow to generate NADH from NAD⁺ in the absence of oxygen.