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Which outcome undermines long-term Inca stone wall stability?

A)Freeze-thaw erosion of fitted ashlars
B)Differential seismic wave propagation shift
C)Root burrowing within wall matrix
D)Dust accumulation altering albedo input

💡 Explanation

Thermal expansion fractures the precisely cut stones during freeze-thaw cycles; this is frost weathering. Because the ashlars lose frictional interlock due to the expansion, it reduces structural integrity, therefore causing the wall to weaken over decades, rather than remaining stable.

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