Which of These Is a Possible Anodic Reaction Which Occurs

Which of these is a possible anodic reaction which occurs during the corrosion of iron?

A) 2Fe(s) → 2Fe²⁺(aq) + 4e ⁻
B) 2H⁺(aq) + 2e ⁻ → H₂(g)
C) 2H₂O(l) + 2e ⁻ → H₂(g) + 2OH ⁻ (aq)
D) O₂(g) + 2H₂O(l) + 4e ⁻ → 4OH ⁻ (aq)
E) SO₂(g) + O₂(g) + 2e ⁻ → SO₄^{2 −} (aq)