It may be, because Florence has the best education system, and mostly they are located on the trade routes.
Answer:
D
Explanation:
depending on what the story was about
Tiles (vulcanized) are made of refractory metal oxides and semi-metallic oxides, through the process of grinding, mixing, pressing, glazing, sintering, and forming an acid-resistant porcelain or stone, Decorative materials.
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