Which of the following statements about Group 17 elements and their compounds is correct?
- AChlorine reacts with cold concentrated sodium hydroxide to form $\text{NaCl}$ and $\text{NaClO}_3$.
- B$\text{HCl}$ is more thermally stable than $\text{HBr}$ because chlorine is less electronegative than bromine.
- CIodide ions are oxidised to iodine by concentrated sulfuric acid.
- DSilver iodide is soluble in dilute aqueous ammonia.