Which of the foll A. They have definite volume

B. They are slightly compressible than solids.

C. Molecules free to move within the substance.

D. They have definite shape and size.

Liquids contain particles which are free to move within the substance. Therefore liquids are able to flow or one can say that liquids do not have a definite shape. The movement of liquid particles helps to acquire the shape of the container in which it is kept in. They have definite volume due to the intermolecular forces of attraction, and are slightly compressible than solids.