Concept:In an electrochemical cell, oxidation occurs at the electrode where electrons are lost.
Explanation:Oxidation is defined as the loss of electrons.
In any electrochemical cell, the anode is the electrode where oxidation takes place.
The cathode is where reduction (gain of electrons) occurs.
The salt bridge only maintains electrical neutrality by allowing ion flow.
The aqueous solution contains the ions and does not itself undergo oxidation.
Thus, oxidation is correctly associated with the anode.
Answer:A. At the anode