Concept:Oxidation always takes place at the anode in both electrolytic and electrochemical cells.
Explanation:At the anode, species lose electrons.
This loss of electrons is defined as oxidation.
Reduction, or gain of electrons, occurs at the cathode.
Thus, electrons are produced at the anode, not consumed.
Therefore, the common feature of anode reactions is oxidation.
Answer:C. oxidation is involved.