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Which risk increased for early bronze-smiths when copper sulfide ores required higher smelting temperatures?

A)Increased tin oxide inclusion rates
B)Weakening of the crucible structure
C)Loss of ductility post-casting
D)Accelerated atmospheric oxidation rates

💡 Explanation

Higher smelting temperatures necessitated by sulfide ores risked crucible failure due to thermal stress overcoming material strength, through solid-state diffusion and grain-boundary sliding. Therefore, crucible rupture increased, rather than improved alloy properties or oxidation, because temperatures exceeded containment thresholds.

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