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Which risk was elevated in Inca masonry when differential foundation settling occurred?

A)Increased tensile stress in lintels
B)Decreased thermal expansion cracking
C)Reduced seismic resonance frequency
D)Enhanced drainage mortar degradation

💡 Explanation

Tensile loads are dangerous to Inca masonry because the stone blocks primarily withstood compression, and differential settling induces bending, increasing tensile stress via beam bending, therefore the stones risk cracking, rather than expansion or drainage because compression remains high otherwise.

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