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← HistoryWhich outcome results when wooden rope bridges experience significant water penetration during winter thaws in the Inca Empire?
A)Increased wind resistance due to stiffening
B)Cable sag increases structural instability✓
C)Improved load distribution within the ropes
D)Enhanced tensile strength of support cables
💡 Explanation
Bridge collapse will occur when cyclic freeze-thaw causes entrained water to expand within ropes, initiating internal cracks via ice wedging, because rope strength decreases significantly; therefore, the bridge sags dangerously, rather than gaining strength at low temperatures which would maintain stability.
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