Which of the Following Reactions Occurs at the Cathode During

Which of the following reactions occurs at the cathode during the formation of rust?

A) $\mathrm { O } _ { 2 } ( g ) + 4 \mathrm { H } ^ { + } ( \mathrm { aq } ) + 4 \mathrm { e } ^ { - } \rightarrow 2 \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { l } )$
B) $\mathrm { Fe } ( \mathrm { s } ) \rightarrow \mathrm { Fe } ^ { 2 + } ( \mathrm { aq } ) + 2 e ^ { - }$
C) Zn(s) ? Zn²⁺(aq) + 2e^?
D) 2H₂(g) ? 4H⁺ + 4e^?
E) $\mathrm { PbO } _ { 2 } ( \mathrm {~s} ) + \mathrm { HSO } _ { 4 } ^ { - } ( \mathrm { aq } ) + 3 \mathrm { H } ^ { + } ( \mathrm { aq } ) + 2 \mathrm { e } ^ { - } \rightarrow \mathrm { PbSO } _ { 4 } ( \mathrm {~s} ) + 2 \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { l } )$