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Which reflective deterioration happens when moisture penetrates Byzantine mosaic tile grouting?

A)Tessera detachment and colour shift
B)Efflorescence and accelerated material erosion
C)Differential thermal expansion and cracking
D)Sulphation and volume stress initiation

💡 Explanation

Efflorescence causes dulling because dissolved salts migrate, then crystallize on mosaic surfaces due to solvent evaporation. The outcome is material erosion and aesthetic degradation; this rather than cracking results because crystal growth drives microfractures near the surface.

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