For which reaction does chlorine’s oxidation number change by the greatest amount?
- A$2\text{KClO}_3 \rightarrow 2\text{KCl} + 3\text{O}_2$
- B$2\text{ClO}^- \rightarrow \text{Cl}^- + \text{ClO}_2^-$
- C$\text{Cl}_2 + \text{H}_2\text{O} \rightarrow \text{HCl} + \text{HClO}$
- D$2\text{NaClO}_2 + \text{Cl}_2 \rightarrow 2\text{NaCl} + 2\text{ClO}_2$