The process is A) dissociation.
Explanation:In this process, the crystalline ions can be separated as well as split into smaller particles like radicals, ions, or atoms, generally in a reversible way.
As an example, if an atom is dissolved in the water, a chemical bond that shares electron pairs among the atoms between a single hydrogen atom and electronegative atom is fragmented through heterolysis fission giving off a positive ion and a negative ion.