When at equilibrium, which of the reactions below will shift to the right if the pressure is increased and the temperature is kept constant?

• A.2SO_3(g) ↔ 2SO_2(g) + O_2(g)
• B.2CO_2(g) ↔ 2CO_(g) + O_2(g)
• C.2H_2(g) + O_2(g) ↔ 2H₂O_(g)
• D.2NO_(g) ↔ N_2(g) + O_2(g)
• E.