Calcium Chloride Is Added to Sodium Chloride Prior to Melting

Calcium chloride is added to sodium chloride prior to melting it for electrolysis in a Downs cell
)

A) to provide calcium ions which serve as the cathode
B) to lower the melting point
C) to increase the concentration of chloride ions
D) to make the chloride ions easier to oxidize
E) to make the sodium ions easier to reduce