The reaction that occurs all the anode when CuSO4(aq) is electrolyzed using carbon electrode is?

A. 2H – (aq) + 2e → H 2(g)
B. Cu2+ (aq) + 2e → Cu (s)
C. 4OH (aq) -4e → 2H2O(l) + O2 (g)
D. SO4(aq)2 -2e → SO2(g) + O2(g)

Correct Answer: Option C