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Which outcome arises with inadequately compacted material used building Incan agricultural terraces?

A)Increased nutrient runoff occurs downstream
B)Elevated methane production near canals
C)Decreased soil salinity accumulates uphill
D)Accelerated carbon sequestration in soil

💡 Explanation

Higher erosion results from poorly compacted fills because increased water infiltration triggers slope failure via soil liquefaction, therefore nutrient runoff increases, rather than leading to reduced water flow or enhanced CO₂ stabilization.

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