In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Ch telier's principle?
A) N2 (g) + 3H2 (g) 2NH3 (g)
B) N2O4 (g) 2NO2 (g)
C) N2 (g) + 2O2 (g) 2NO2 (g)
D) 2N2 (g) + O2 (g) 2N2O (g)
E) N2 (g) + O2 (g) 2NO (g)