Concept:Iodine and naphthalene are nonpolar covalent substances, so “like dissolves like” requires a nonpolar solvent.Explanation:Carbon(IV) sulphide (CS2) is a nonpolar solvent.Water is polar, while ethanol is also polar due to hydrogen bonding, so they are not suitable for dissolving nonpolar naphthalene.Carbon(IV) sulphide dissolves both iodine and naphthalene well, making it the suitable solvent.Answer:A. carbon (IV) sulphide