Why might adding inorganic phosphate to a reaction mixture where glycolysis was rapidly proceeding help sustain the metabolic pathway?

A) It increases the energy level of the electrons that are transferred to the electron transport chain where ATP is produced.
B) It would increase the oxygen supply available for aerobic respiration because each phosphate group has four oxygen atoms as constituents.
C) The metabolic intermediates of glycolysis are phosphorylated.
D) It would increase the amount of glucose available for catabolism.