A sealed, flexible container held 250 mL of a substance. The volume of the container was then decreased to 100 mL without any matter escaping. What must be true about the matter in the container before the container's volume was changed? A.
Its particles were in constant, rapid motion.
B.
It was all located at the bottom of the container.
C.
Its particles were held together tightly in a rigid structure.
D.
It would have kept its shape if transferred to another container.