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Which outcome results when specific impurities bridge band gaps?

A)Increased electrical conductivity occurs
B)Reduced thermal expansion results
C)Enhanced optical reflectivity occurs
D)Giant magnetoresistance diminishes completely

💡 Explanation

Increased electrical conductivity results from extrinsic semiconduction because impurity atoms introduce energy levels within the band gap, allowing electrons to jump to the conduction band; therefore, conductivity rises rather than other optical or thermal effects.

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