The equation below represents one reaction in a rechargeable lead/acid battery. $\text{Pb}(s) + \text{PbO}_2(s) + 4\text{H}^+(aq) + 2\text{SO}_4^{2-}(aq) \rightarrow 2\text{PbSO}_4(s) + 2\text{H}_2\text{O}(l)$. Which statement concerning this reaction is correct?
- ALead is both oxidised and reduced.
- BLead is neither oxidised nor reduced.
- CLead is oxidised only.
- DLead is reduced only.