Which One of the Following Statements Best Explains Why Convection

Multiple Choice

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.
E) Solids are less compressible than gases.