All the public inscriptions in the town were painted alike, in severe characters of black and white. The jail might have been the infirmary, the infirmary might have been the jail, the town-hall might have been either, or both, or anything else, for anything that appeared to the contrary in the graces of their construction. Fact, fact, fact, everywhere in the material aspect of the town; fact, fact, fact, everywhere in the immaterial. What is the main idea that Dickens is making in this passage?

O Industrialization had caused environmental pollution.
O Workers in the Coketown factory faced difficult conditions.
O Every building in Coketown looked the same, no matter its purpose.
O People worked long hours for little pay.