Consider the system at equilibrium: NH4HS(s) ⇌ NH3(g) + H2S(g) ∆H > 0 Factors which favor the format — Equilibrium Chemistry Question

Consider the system at equilibrium:
NH₄HS(s) ⇌ NH₃(g) + H₂S(g) ∆H > 0
Factors which favor the formation of more H₂S(g) include which of the following?
I adding a small amount of NH₄HS(s) at constant volume
II increasing the pressure at constant temperature
III increasing the temperature at constant pressure