Which Statement Concerning the Following Reaction Isn't True

Which statement concerning the following reaction isn't true?
2 HI(g) H₂(g) + I₂(g)

A) At equilibrium, the concentrations of the three gases do not change with time.
B) K_p = K_c
C) The partial pressures of I₂ and H₂ are equal at equilibrium, regardless of the initial pressures of HI, H₂, and I₂.
D) HI decomposes as fast as it is formed once equilibrium is established.
E) The percent dissociation of HI does not depend on the total pressure.