Which row gives the conditions used in the Contact process?
- Atemperature $25\,^{\circ}\text{C}$; pressure $2\,\text{atm}$; catalyst iron
- Btemperature $25\,^{\circ}\text{C}$; pressure $200\,\text{atm}$; catalyst iron
- Ctemperature $450\,^{\circ}\text{C}$; pressure $2\,\text{atm}$; catalyst vanadium(V) oxide
- Dtemperature $450\,^{\circ}\text{C}$; pressure $200\,\text{atm}$; catalyst vanadium(V) oxide