The half-reaction that should occur at the anode during electrolysis of aqueous potassium bromide solution is o a. 2 Br (aq) > Br2() + 2 e- O b. 2 H20 -> O2(g) + 4H+(aq) + 4 e O c. 2 H(aq) + e -> H2(g) O d. Br2(g) + 2 e--> 2 Br(aq) e. Na+(aq) + e--> Na(s)