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Which outcome results when seasonal freeze-thaw within the Taj Mahal’s sandstone foundation causes accelerated decay within its pietra dura inlays?

A)Sulphation increases biogenic crust formation
B)Salt crystallization induces tensile stress
C)Oxidation accelerates uniform surface recession
D)Hydration promotes integral binder dissolution

💡 Explanation

Salt crystallization within porous pietra dura induces significant tensile stress during freeze-thaw cycles because differential expansion strains the stone matrix. Therefore, widespread cracking occurs, rather than only surface recession driven by the other processes.

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