At a Fixed Temperature and 1

At a fixed temperature and 1.00 atm total pressure, NO₂ gas and N₂O₄ gas are in equilibrium.
2 NO₂(g) N₂O₄(g)
What is the effect of increasing the total pressure to 10.0 atm at a constant temperature?

A) K_p increases, but the partial pressure of N₂O₄ decreases.
B) K_p decreases, but the partial pressure of N₂O₄ increases.
C) Both K_p and the partial pressure of N₂O₄ decrease.
D) Both K_p and the partial pressure of N₂O₄ increase.
E) K_p remains the same and the partial pressure of N₂O₄ increases.