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(D) Copper $(Cu)$ is a conductor,and its resistance decreases as the temperature decreases because the scattering of electrons by lattice vibrations r

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Resistance of copper decreases while that of germanium increases

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(D) Copper $(Cu)$ is a conductor,and its resistance decreases as the temperature decreases because the scattering of electrons by lattice vibrations reduces.Germanium $(Ge)$ is a semiconductor,and its resistance increases as the temperature decreases because the number of free charge carriers (electrons and holes) decreases exponentially with a decrease in temperature.Therefore,the resistance of copper decreases while that of germanium increases.

$A$ piece of copper and another of germanium are cooled from room temperature to $80\, K$. Which of the following is a correct statement?

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