The 5th Nanjing Jasmine Culture Tourism Festival was held in Jinniu Lake, Liuhe District, the birthplace of the folk song Jasmine, with the slogan "Jasmine fragrance, jasmine fragrance".
The slogan "Jasmine fragrance, Jasmine fragrance" shows that molecules are constantly moving; It's not that molecules are big; There are gaps between molecules; Molecules can become atoms.
So choose B.