Correct Answer: Option C

Explanation

When copper electrodes are used to electrolyze an aqueous copper sulfate solution, the following happens at the anode:

• Copper loses electrons: Copper atoms at the anode lose electrons, forming copper ions that go into the solution. 
• Anode dissolves: The anode slowly dissolves away as the electrolysis continues. 
• Copper ions are generated: Copper ions are generated at the anode.  In summary, there is dissolution of copper electrode - Option C

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