A NiCd battery uses nickel and cadmium to produce a potential difference. Using these equations, answer the following questions:
I. 2NiO(OH) (s) + 2H2O (l) + 2e- -> 2Ni(OH)2 (s) + 2OH- (aq)
II. Cd(s) + 2OH- (aq) -> Cd(OH)2 (s) + 2e-
III. Cd (s) + 2NiO(OH) (s) + 2H2O (l) -> 2Ni(OH)2 (s) + Cd(OH)2 (s)
Which equation represents what takes place at the anode?