Which of the Following Statements Regarding the Hall-Heroult Process Is

Which of the following statements regarding the Hall-Heroult process is NOT correct?

A) The production of aluminum from aluminum oxide is exothermic.
B) Electric current is used to reduce Al³⁺ ions to Al metal.
C) The principle energy cost of the Hall-Heroult process is the electricity needed to convert aluminum ions to aluminum metal.
D) The major cost in recycling aluminum is the energy required to melt Al metal.
E) The enthalpy of reaction for the production of molten Al from Al₂O₃ under the conditions used in the Hall-Heroult process is about 20 times larger (in magnitude) than the energy required to heat and melt Al metal.