Which of the following is correct? Select one:

A. Kₛₚ is the solubility product constant for a precipitate.
B. Kₛₚ is the same as the solubility.
C. Solubility is the concentration of unsaturated ions in solution.
D. Solubility = Kᵥᵥ * Kₛₚ
E. Kₛₚ is an equilibrium constant and solubility is the concentration of a saturated solution.