The diagram shows apparatus used in an attempt to electroplate a metal ring with copper. D metal ring. bulb copper electrode aqueous copper(II) sulfate (electrolyte) The experiment did not work. What change is needed in the experiment to make it work? A Add solid copper(II) sulfate to the electrolyte. B Increase the temperature of the electrolyte. C Replace the copper electrode by a carbon electrode. Reverse the connections to the battery.​