At 450°C, Tert-Butyl Alcohol Decomposes into Water and Isobutene

Multiple Choice

At 450°C, tert-butyl alcohol decomposes into water and isobutene. (CH₃) ₃COH(g) ⇄ (CH₃) ₂CCH₂(g) + H₂O(g)
A reaction vessel contains these compounds at equilibrium. What will happen if the volume of the container is reduced by 50% at constant temperature?

A) The forward reaction will proceed to reestablish equilibrium.
B) The reverse reaction will proceed to reestablish equilibrium.
C) No change occurs.
D) The equilibrium constant will increase.
E) The equilibrium constant will decrease.