Correct answer: Molten Cryolite conducts electricity because it furnishes charged particles.

Why?:

Cryolite is an ionic compound. When in solution, it ionizes to produce charged particles. These are the sodium cations, aluminum cations, and the fluoride anions. To conduct electricity a substance must have charged particles that are mobile. Molten cryolite has three different ions that can move through the liquid, allowing the flow of charge from one end of a sample of molten cryolite to the other.

Answering this question:

Always remember that electricity is the flow of electrons. Electrons are charged particles. This also means that the ions can conduct electricity if they are moving from one place to another to facilitate the flow of charges.

Therefore, molten cryolite conducts electricity because it furnishes ions in the solution.