Which of the Following Is NOT Associated with the Production

Which of the following is NOT associated with the production of iron from iron ore in blast furnaces?

A) Iron ore, coke, and limestone are used.
B) Solid by-products collect on top of molten iron, which is removed from the bottom of the reaction vessel.
C) Molten iron crystallizes at its melting point of 1538C in a bcc structure but then undergoes a phase transition at around 139011eed92d_389f_8cc5_a0ba_9557e4654adf_TB6562_11C to an fcc structure.
D) Limestone (CaCO₃) decomposes to form lime (CaO) , which can react with silica impurities (SiO₂) in the iron ore.
E) The carbon content is reduced by heating the impure molten iron in a second furnace to temperatures above 160011eed92d_389f_8cc5_a0ba_9557e4654adf_TB6562_11C.