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Which threat increased for Inca rope bridges during wetter highland seasons within the Andes?

A)Increased structural deck oscillation
B)Decreased pedestrian weight capacity
C)Accelerated abutment settling velocity
D)Enhanced anchor corrosion resistance

💡 Explanation

Increased moisture saturates the natural fiber ropes, decreasing tension; the bridge's natural frequency lowers, because of increased inertial mass leading to resonance when excited by wind or pedestrians, therefore leading to oscillations, rather than improving stability, as decay accelerates

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