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← HistoryWhich structural failure arises because of inadequate stone shaping in Inca retaining walls?
A)Hydrostatic pressure exceeds wall cohesion✓
B)Differential thaw weakening underlying soils
C)Seismic amplification shattering mortar bonds
D)Vegetative root action causes erosion
💡 Explanation
Inca walls endured when designed without mortar because precise Ashlar stone fitting spread hydrostatic pressure evenly; thus failure occurs with poorly shaped stones exceeding the limit rather than seismic effects overwhelming stronger mortars, or thaw cycles creating instability in wall supports.
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