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Which consequence results when dopants alter grain boundaries?

A)Enhanced catalytic activity emerges rapidly
B)Complete internal reflection becomes impossible
C)Alloy undergoes uniform volume expansion
D)Fermi level shifts at interface

💡 Explanation

The Fermi level alignment shifts occur because dopants cause charge accumulation at grain boundaries through band bending, therefore interfacial potentials shift where space charge neutrality occurs rather than bulk uniform modification or catalysis.

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