The Following Pictures Represent Solutions of CaCO₃,which May Also Contain

Multiple Choice

The following pictures represent solutions of CaCO₃,which may also contain ions other than Ca²⁺ and CO₃^2- which are not shown.Gray spheres represent Ca²⁺ ions and unshaded spheres represent CO₃^2- ions.
-If solution (1) is a saturated solution of CaCO₃,which of solutions (1) -(4) represents the solution after a small amount of K₂CO₃ is added and equilibrium is restored?

A) (1)
B) (2)
C) (3)
D) (4)