Automotive Car Batteries Rely on the Reaction Shown Below

Automotive car batteries rely on the reaction shown below.  Identify the spectator ion(s) . PbO₂(s) + 4 H⁺(aq) + 2 SO₄^2-(aq) + Pb(s) → 2 PbSO₄(s) + 2 H₂O(l)

A) SO₄^2-
B) H⁺
C) H⁺ and SO₄^2-
D) There are no spectator ions.