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← HistoryWhich risk increased for Roman legionary roads laid upon estuarine mudflats?
A)Amphibious landing vulnerability
B)Increased seasonal frost heave
C)Accelerated roadbed subsidence✓
D)Reduced marching speed limits
💡 Explanation
Roads on mudflats experienced accelerated roadbed subsidence, because consolidation settlement occurs as unstable soils compress under load, therefore differential settlement increases exponentially rather than linearly under the repeated loads; moreover it is amplified by frequent seasonal inundation cycles.
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