Which change happens when a substance freezes?
a. The intermolecular forces between atoms in the molecules weaken, and the atoms move apart, and the molecules change into a different substance.
b. The intermolecular forces of the substance strengthen. The molecules move closer together, but the molecules do not change.
c. The intermolecular forces of the substance weaken. The molecules move apart, but the molecules do not change.
Selected:d. The intermolecular forces between atoms in the molecules strengthen, and the atoms move closer together, and the molecules change into a different substance.