A laboratory galvanic cell is built with a Mg electrode in 1.0 M Mg2+ solution and a Pb electrode in 1.0 M Pb2+ solution. Which single modification would convert the setup into an electrolytic cell while keeping all hardware and solutions unchanged?
a) Connect the two electrodes to a DC power supply with the magnesium electrode attached to the negative terminal.
b) Increase the concentrations of both ion solutions to 2.0M.
c) Connect the two electrodes to a DC power supply with the magnesium electrode attached to the positive terminal.
d) Replace the salt bridge with a porous disk to slow ion migration.