For the Reaction Given Below, Which Half Reaction Occurs at the Anode

For the reaction given below, which half reaction occurs at the anode?
2 H₂(g) + O₂(g) $\rarr$ 2 H₂O(l)

A) H₂ $\rarr$ H₂O
B) O₂ $\rarr$ H₂O
C) H₂O $\rarr$ H₂
D) H₂O $\rarr$ O₂
E) H₂(g) $\rarr$ 2H⁺