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Which outcome occurs when differential settling affects load-bearing ziggurats?

A)Vertical cracking spreads through mudbrick
B)Decreased airflow through ventilation shafts
C)Uniform thermal expansion accelerates degradation
D)Erosion of outer baked brick layers

💡 Explanation

Vertical cracking results because differential settling along the foundation causes shear stress propagating upward through the unfired brick. This exceeds the tensile strength; therefore, cracking is concentrated vertically, rather than influencing airflow or overall erosion from atmospheric exposure.

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