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Which risk increased disproportionately upon Viking longships using rope bridges for rapid troop deployment?

A)Shear stress on bridge anchors
B)Torsional stress within braided ropes
C)Bridge deck planking hydrostatic uplift
D)Rope material thermal expansion

💡 Explanation

Torsional stress significantly increased due to the varying gaits of multiple soldiers traversing simultaneously. This leads to rope twisting and inter-strand friction, because forces are nonuniform rather than evenly distributed; therefore, rope failure risk increased rather than just linear bridge failure or thermal effects.

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