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During Mughal construction, which effect could minimize cracking in pietra dura?

A)Use precise thermal expansion matching
B)Maximize pigment concentrations in stones
C)Increase the mortar joint thickness
D)Employ larger, fewer stone pieces

💡 Explanation

Cracking minimizes by matching thermal expansion, because differential volumetric changes induce stress exceeding material limits, triggering thermal stress failure. Therefore, matching coefficients reduces stress; rather than increasing pigment (cosmetic), mortar (less force transfer at all) or size (increases surface area). The mechanism is uniform thermal expansion.

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