Which one of the following statements best explains why convection does not occur in solids? (A)...

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Which one of the following statements best explains why convection does not occur in solids?
(A) Molecules in a solid are more closely spaced than in a gas.
(B) The molecules in a solid are not free to move throughout the volume of the solid.
(C) Molecules in a solid vibrate at a lower frequency than those in a liquid.
(D) Solids are more compressible than liquids.
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