The equation for the reaction of sulfur dioxide with oxygen is shown below. $2\text{SO}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{SO}_3(g)$ This reaction is exothermic. Which change causes the equilibrium position to move to the right?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 only