When the Substances in the Equation Below Are at Equilibrium $\Delta$

When the substances in the equation below are at equilibrium, at pressure P and temperature T, the equilibrium can be shifted to favor the products by CuO(s) + H₂(g) H₂O(g) + Cu(s) $\Delta$ Hº_rxn = -2.0 kJ/mol

A) increasing the pressure by means of a moving piston at constant T.
B) increasing the pressure by adding an inert gas such as nitrogen.
C) decreasing the temperature.
D) allowing some gases to escape at constant P and T.
E) adding a catalyst.