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Which outcome results in Mughal pietra dura from repeated freeze-thaw cycles?

A)Differential thermal expansion fractures
B)Biofilm growth etches the surface
C)Salt crystal formation generates stresses
D)Ultraviolet exposure bleaches colors

💡 Explanation

Differential thermal expansion occurs because embedded stones expand and contract differently than marble during freeze-thaw. Because there is material incompatibility, therefore fracturing results, rather than uniform volumetric change or alteration of the pigments.

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