The table presents some physical properties of four different substances. Which row gives the properties of a non-metal element?
- Amelting point $63^{\circ}\text{C}$, good conductivity when solid, good conductivity when melted
- Bmelting point $119^{\circ}\text{C}$, poor conductivity when solid, poor conductivity when melted
- Cmelting point $659^{\circ}\text{C}$, good conductivity when solid, good conductivity when melted
- Dmelting point $808^{\circ}\text{C}$, poor conductivity when solid, good conductivity when melted