Hydrogen Oxygen Cathode Battery H₂O()- -H2(g) + + O2(g) -Anode The reaction in which H₂O(!) is decomposed into H2(g) and O2(g) is thermodynamically unfavorable (AG > 0). However, an electrolytic cell, such as the one represented above, can be used to make the reaction occur. Which of the following identifies a flaw in the representation? A Oxidation is occurring at the anode instead of at the cathode. B The equation for the reaction is not correctly balanced. C Electrical energy is needed for the reaction to proceed. D The relative volumes of collected gas shown in each tube are incorrect.