They vibrate quickly in place. They spread apart to fill their container. They move at the same speed as in a liquid. They move slowly over one another.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which best describes the motion of molecules in the gaseous state?
Possibilities:
- They vibrate quickly in place.
- They spread apart to fill their container.
- They move at the same speed as in a liquid.
- They move slowly over one another.

They spread apart to fill their container.