Which of the Following Is NOT Associated with the Production $\circ$

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 1538 ^$\circ$ C in a bcc structure but then undergoes a phase transition at around 1390 ^$\circ$ C to a 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 1600 ^$\circ$ C.