Sodium iodide reacts with concentrated sulfuric acid. The equation below shows one of the reactions that occurs. $8\text{NaI} + 9\text{H}_2\text{SO}_4 \rightarrow 8\text{NaHSO}_4 + 4\text{I}_2 + \text{H}_2\text{S} + 4\text{H}_2\text{O}$ Which species has been oxidised in this reaction?
- A$\text{H}^+$
- B$\text{I}^-$
- C$\text{Na}^+$
- D$\text{SO}_4^{2-}$