Most likely be B because persuasive speech has to have an ethical and rational concept about the subject your talking about, and very verbal because you need to persuade your audience to get interested in what your talking about.
The answer is: They are subway or train tracks.
In the excerpt from "Anthem," by Ayn Rand, the narrator travels through an abandoned underground tunnel. She describes how they go below ground into a large tunnel and see the "long thin tracks of iron," which is not iron. They also touch the cold and smooth train or subway tracks, and crawl forward intending to find out where the tracks take to.
I believe the word is Margins
