Which one of the following statements about the redox reactions of the electron transport chain is correct?

a. The redox reactions of the electron transport chain are directly coupled with the synthese of ATP
b. The redox reactions of the electron transport chain are directly coupled to the movement of protons across a membrane
c. The electron transport chain takes electrons from water and gives them to oxygen
d. NADH gains electrons in the initial reaction of the electron transport chain
e. The oxidation of NADH is directly coupled to the reduction of oxygen to water