A bottle of perfume is opened and the smell travels across the room. What can be inferred from this?

A. move faster when they are cold. B. move more slowly when they are cold. C. are always in motion and can travel D. are large enough to be seen with a microscope.A bottle of perfume is opened and the smell travels across the room. What can be inferred from this?
C are always in motion and can travel


I think this is to do with Brownian Motion that causes excited molecules to leave the bottle of perfume and diffuse across the room - Molecular Diffusion - molecules will move from an area of high concentration to low concentrationA bottle of perfume is opened and the smell travels across the room. What can be inferred from this?
The perfume have voltalie components like alcohol,so molecules travel in the air to spread the smell.