One stage in the production of sulfuric acid is the oxidation of sulfur dioxide to sulfur trioxide. Which conditions are used for this stage?
- A$450\,^{\circ}\text{C},\;1.5\;\text{atmospheres},\;\text{iron}$
- B$450\,^{\circ}\text{C},\;1.5\;\text{atmospheres},\;\text{vanadium(V) oxide}$
- C$450\,^{\circ}\text{C},\;200\;\text{atmospheres},\;\text{iron}$
- D$450\,^{\circ}\text{C},\;200\;\text{atmospheres},\;\text{vanadium(V) oxide}$