Though not entirely accurate, 'A' is the best possible answer.
Water is considered the universal solvent. Water is polar and has a partially positive and negative charge, it readily dissolves ions and polar molecules. When an ionic substance is added to water, individual ions interact with the polar regions of the water molecules during the dissociation process, disrupting their ionic bonds. The charges associated with these molecules form hydrogen bonds with water, surrounding the particle with water molecules. This is referred to as a sphere of hydration, or a hydration shell, and serves to keep the particles separated or dispersed in the water.
