In What Way Is Cryolite (Na₃AlF₆)used in the Production of Aluminum

Multiple Choice

In what way is cryolite (Na₃AlF₆) used in the production of aluminum?

A) Cryolite is a catalyst,it increases the rate of aluminum reduction.
B) Cryolite-bauxite mixtures melt at lower temperatures than pure bauxite.
C) Cryolite makes aluminum more corrosion resistant.
D) Cryolite is reduced to aluminum at the cathode.
E) Cryolite is oxidized to F₂(g) at the anode.