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Which risk increased in early Chinese crossbows when rapid firing exceeded optimal design?

A)String fraying from friction heating
B)Metal trigger sears yielding plastically
C)Wood stock delamination from moisture
D)Bowstring attachment knot slippage

💡 Explanation

Plastic deformation became an issue because exceeding the design limits stressed the trigger sears beyond ultimate tensile strength; thus, this material Yielding plastically was more common, rather than string fraying or wood delaminating due to relatively lower thermal inputs and slower moisture.

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