The displacement reaction between aqueous halogen, $X_2$, and aqueous halide ions, $Y^-$, is represented by the equation below. $X_2\text{(aq)} + 2Y^-\text{(aq)} \rightarrow 2X^-\text{(aq)} + Y_2\text{(aq)}$ Which row correctly names $X_2$ and $Y^-$ and gives the reason that this reaction occurs?
- A$X_2$: chlorine; $Y^-$: iodide; chlorine is less reactive than iodine
- B$X_2$: chlorine; $Y^-$: iodide; chlorine is more reactive than iodine
- C$X_2$: iodine; $Y^-$: chloride; chlorine is less reactive than iodine
- D$X_2$: iodine; $Y^-$: chloride; chlorine is more reactive than iodine