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← HistoryWhich risk increases during Viking Age navigation when unfavorable wind conditions require continuous extreme sail adjustments?
A)Rope strain exceeding yield strength✓
B)Iron keel detachment from hull
C)Oak hull delamination underwater
D)Brittle sailcloth fiber fracture
💡 Explanation
Constant sail adjustments under heavy wind load greatly increases rope tension cycles, which induces fatigue, leading to rope strain exceeding yield strength because progressive deformation accumulates; therefore, rope failure is more probable rather than keel or hull failure whose failure mechanisms are different.
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