Identify the overall oxidation reaction that occurs in a lead storage cell during discharge.

• A
  $Pb_{(aq)}^{2+} + SO_{4(aq)}^{2-} \longrightarrow PbSO_{4(s)}$
• B
  $PbSO_{4(s)} + 2 H_2O_{(l)} \longrightarrow PbO_{2(s)} + 4 H_{(aq)}^{+} + SO_{4(aq)}^{2-} + 2 e^{-}$
• C
  $Pb_{(s)} + SO_{4(aq)}^{2-} \longrightarrow PbSO_{4(s)} + 2 e^{-}$
• D
  $PbSO_{4(s)} + 2 e^{-} \longrightarrow Pb_{(s)} + SO_{4(aq)}^{2-}$