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← GeographyWhich outcome results when thawing permafrost collapses roads?
A)Solifluction increases slope instability✓
B)Oxidation accelerates road aggregate breakdown
C)Erosion deposits silt on roadways
D)Abrasion mechanically wears the pavement
💡 Explanation
Solifluction increases slope instability because thawing permafrost creates a saturated, unstable active layer that flows downslope. This causes road collapse due to loss of support, therefore slope instability dominates, rather than material breakdown or common erosion.
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