Atoms that were once in fixed positions now slide past one another best
describes the behavior.
Solid state of matter have atoms which are densely and tightly packed
together thereby restricting the movement of the atoms. There is little or no
elastic collision between the atoms.
In the liquid state, the molecules aren't as tightly packed as the solid and
they experience an increase in the entropy(disorderliness) of the atoms and
they slide past one another. This explains option C as the right choice.
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