A key stage in the Contact process involves an equilibrium reaction. $2\text{SO}_2 + \text{O}_2 \rightleftharpoons 2\text{SO}_3$ Which row shows the effect of the named condition on the equilibrium yield?
- Apresence of catalyst: no effect on yield; high pressure: decreases yield; high temperature: increases yield
- Bpresence of catalyst: no effect on yield; high pressure: increases yield; high temperature: decreases yield
- Cpresence of catalyst: increases yield; high pressure: decreases yield; high temperature: increases yield
- Dpresence of catalyst: increases yield; high pressure: increases yield; high temperature: decreases yield