K_w, the Equilibrium Constant for the Ionization of Water by the Equation

Multiple Choice

K_w, the equilibrium constant for the ionization of water by the equation below, is 1.0 x 10^-14. What does that mean when we are considering pure water?

A) More ions exist than water molecules.
B) The majority of the molecules present are in the form of H₂O.
C) The amount of water is the same as the amount of the ions present.
D) There will always be more hydronium ions present than water at equilibrium.