An Endothermic Reaction CaCO₃(s) CaO (S) + CO₂ (G)

An endothermic reaction CaCO₃(s) CaO (s) + CO₂ (g)
At equilibrium is suddenly cooled to a lower temperature and allowed to equilibrate at the new temperature. Which of these statements correctly describes the new equilibrium?

A) The partial pressure of CO₂ increases.
B) The equilibrium constant decreases.
C) The equilibrium constant remains the same.
D) The equilibrium constant increases.
E) None of the statements above is correct.