Assuming that all reactants and products are unit activity, except pH = 7. Which of the following electron donors and electron acceptors pairs do not represent the energy reactions for bacterial growth. ( )

A、 Electron donor: acetic acid,
Electron acceptor: Fe3+ (reduced to Fe2+)
B、 Electron donor: acetic acid,
Electron acceptor: H+ (reduced to H2)
C、Electron donor: glucose,
Electron acceptor: Fe3+ (reduced to Fe2+)
D、Electron donor: H2,
Electron acceptor: CO2 (methane production reaction)