Consider the following equation : $$ 2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g}), \Delta \mathrm{H}=-190 \mathrm{~kJ} $$ The number of factors which will increase the vield of $\mathrm{SO}_3$ at equilibrium from the following is A. Increasing temperature B. Increasing pressure C. Adding more $\mathrm{SO}_2$ D. Adding more $\mathrm{O}_2$ E. Addition of catalyst