The reaction, glutamate + NAD(P)⁺ + H₂O → NH₄⁺ + α-ketoglutarate + NAD(P)H + H⁺, is catalyzed by:

A) Nitrogenase.
B) carbamoyl-phosphate synthetase (CPS-I).
C) glutamate dehydrogenase (GDH).
D) glutamine synthetase (GS).
E) none are true.