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Which instability increased in Mughal pietra dura art when thermal expansion differed extremely?

A)Matrix cracking propagates rapidly
B)Epoxy binder softens prematurely
C)Grout erodes underlying brickwork
D)Mortar strength increases significantly

💡 Explanation

Differential thermal expansion created stress concentrations causing matrix cracking that propagated in highly contrasted stone inlays because increased temperature gradients exceeded material-dependent thermal stress limits, therefore surface cracking grew rapidly, rather than epoxy failure or grout erosion being the initial dominant effect.

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