The correct option is A Hydration
If the hydration energy is equal to or greater than the lattice energy, then the salt is water-soluble. In order to dissolve a salt, you have to break apart the ions and hydrate them in solution. You can use the enthalpies of hydration of the ions, and the crystal lattice energy of the solid, to predict which compounds will dissolve. Silver chloride is sparingly soluble in water because its lattice energy is greater than hydration energy.