The Half-Reaction That Occurs at the Cathode During Electrolysis of an Aqueous

The half-reaction that occurs at the cathode during electrolysis of an aqueous sodium iodide solution is

A) Na⁺ + e^- $\rarr$ Na.
B) Na $\rarr$ Na⁺ + e^-.
C) 2H₂O + 2e^- $\rarr$ H₂ + 2OH^-.
D) I₂ + 2e^- $\rarr$ 2I^-.
E) ( $\rarr$ 2I^- $\rarr$ I₂ + 2e^-) .