What is the purpose of the dashes in this excerpt from "Totally like whatever, you know?" "Declarative sentences—so--called
because they used to, like, DECLARE things to be true, okay,
as opposed to other things are, like, totally, you know, not—
have been infected by a totally hip
and tragically cool interrogative tone?"

(4 points)
To maintain the normal flow of ideas
To support the author's purpose of maintaining normal flow of ideas
To disrupt the normal flow of ideas
To explain the normal flow of ideas