The table lists the physical properties of three elements, $X$, $Y$ and $Z$. Element $X$: melting point $-7^{\circ}\text{C}$, boiling point $59^{\circ}\text{C}$, density $3.12\ \text{g cm}^{-3}$ Element $Y$: melting point $98^{\circ}\text{C}$, boiling point $883^{\circ}\text{C}$, density $0.97\ \text{g cm}^{-3}$ Element $Z$: melting point $649^{\circ}\text{C}$, boiling point $1107^{\circ}\text{C}$, density $1.74\ \text{g cm}^{-3}$ Which elements might $X$, $Y$ and $Z$ be?
- A$X=\text{Br}_2,\ Y=\text{Al},\ Z=\text{Si}$
- B$X=\text{Br}_2,\ Y=\text{Na},\ Z=\text{Mg}$
- C$X=\text{I}_2,\ Y=\text{Mg},\ Z=\text{Na}$
- D$X=\text{I}_2,\ Y=\text{Si},\ Z=\text{K}$