The oxide $\text{SeO}_2$ is produced by selenium, and it dissolves in concentrated aqueous sodium hydroxide. Zirconium produces the oxide $\text{ZrO}_2$, and this oxide dissolves in concentrated sulfuric acid. How are the elements selenium and zirconium classified?
- Aselenium: metal, zirconium: metal
- Bselenium: metal, zirconium: non-metal
- Cselenium: non-metal, zirconium: metal
- Dselenium: non-metal, zirconium: non-metal