Sulfur dioxide, $\text{SO}_2$, is used in wines to stop ethanol being oxidised by air. To find the amount of $\text{SO}_2$, a wine sample is titrated using iodine, $\text{I}_2$. For this reaction, 1 mole of $\text{SO}_2$ is oxidised by 1 mole of $\text{I}_2$. By how much does the oxidation number of sulfur change in this reaction?
- A$+2$ to $+4$
- B$+2$ to $+6$
- C$+4$ to $+5$
- D$+4$ to $+6$