Thermal properties and temperature — practice question

Four students are asked to state and explain how the thermal expansion of solids compares with that of gases. Which student is correct?

• AGases expand more than solids because the molecules in a gas are in random motion.
• BGases expand more than solids because the attractive forces between molecules are much weaker in gases.
• CSolids expand more than gases because the molecules are closer together in solids.
• DSolids expand more than gases because the molecules in a solid are in a regular pattern.