Which Type of Regulation Is Most Likely for the Regulated

Which type of regulation is most likely for the regulated enzymes of energy-generating oxidative pathways?

A) Stimulation by adenosine triphosphate (ATP) .
B) Stimulation by adenosine diphosphate (ADP) .
C) Stimulation by the reduced form of nicotinamide adenine dinucleotide (NADH) .
D) Feedback inhibition by carbon dioxide.
E) Inhibition by the substrate of the pathway.