Given the Three-Step "Blast Furnace" Process That Converts Iron Ore,Fe₂O₃,into

Given the three-step "blast furnace" process that converts iron ore,Fe₂O₃,into molten "pig iron": 3 Fe₂O₃(l) + CO(g) → 2 Fe₃O₄(l) + CO₂(g)
Fe₃O₄(l) + CO(g) → 3 FeO(l) + CO₂(g)
FeO(l) + CO(g) → Fe(l) + CO₂(g)
How many moles of Fe₂O₃ are required to produce 6.00 mol of molten iron?

A) 3.00 mol
B) 4.00 mol
C) 6.00 mol
D) 12.0 mol
E) none of the above