Sodium is made by the electrolysis of a molten mixture of about `40%` NaCl and `60%` CaCl_(2)` because
A. `CaCl_(2)` helps in conduction of electricity
B. This mixture has a lower melting point than NaCl.
C. `Ca^(+)+` can displace Na from NaCl
D. `Ca^(+) +` can reduce NaCl to Na.
