How does the thermal conductivity of a solid metal generally change with increasing temperature?

Question

How does the thermal conductivity of a solid metal generally change with increasing temperature? — Exam MCQ

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B. It decreases — The source selects B. The thermal conductivity of many pure metals decreases as temperature rises, but the actual dependence varies with the metal and temperature range.

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A. It increases

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C. It remains constant

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D. Its decrease or increase depends on temperature

How does the thermal conductivity of a solid metal generally change with increasing temperature?

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