Aluminum Is Obtained by

Aluminum is obtained by

A) the electrolysis of cryolite,Na₃AlF₆.
B) reduction by a strong inorganic reducing agent,such as thiosulfate ion,S₂O₃²⁻.
C) the reduction of Al₂O₃ by carbon monoxide in a blast furnace.
D) chemical decomposition of Al₂O₃ at temperatures greater than 2000°C.
E) electrolysis of a molten mixture of bauxite ore and cryolite,Na₃AlF₆.