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Which outcome results when excessive point-defects accumulate within a crystal?

A)Increased phonon scattering weakens material
B)Enhanced electron mobility within lattice
C)Higher critical temperature, superconductivity
D)Uniform spontaneous magnetization increases sharply

💡 Explanation

Increased phonon scattering weakens material because phonon transport is disrupted by accumulating defects; point defects introduce disorder that impedes uniform lattice vibrations, therefore vibrational energy dissipation increases rather than creating more ordered structures or promoting electronic phenomena.

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