Which statement concerning the extraction of iron from hematite in the blast furnace is correct?
- ACoke is reduced to carbon dioxide producing thermal energy to heat the furnace.
- BHematite contains iron(III) oxide which is reduced by carbon monoxide.
- CLimestone is added to the blast furnace and is a substance that consists mainly of calcium oxide.
- DMolten slag is formed from a reaction between hematite and silicon(IV) oxide.