GMAT Sentence Correction (SC) | Re: Extracting pure aluminum from bauxite

Extracting pure aluminum from bauxite and other oresusing the Hall-Héroult process, with a vast amount of electrical energy separating the element from aluminum oxide, making aluminum an energy-dense resource with a huge carbon footprint.

using the Hall-Héroult process, with a vast amount of electrical energy separating the element from aluminum oxide, making
by means of the Hall-Héroult process, in which a vast amount of electrical energy separates the element from aluminum oxide, making
by