The reaction taking place at the anode when a dilute aqueous solution of `CuSO_(4)` is electrolysed using inert Pt electrodes.
A. `2SO_(4)^(2-)rarrS_(2)O_(4)^(2-)+2e^(-)`
B. `Cu^(2+)+2e^(-)rarrCu`
C. `2H_(2)O rarrO_(2)+4H^(+)+4e^(-)`
D. `2H^(+)+2e^(-)rarrH_(2)`
