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? "
a)to demonstrate uncertainty about the normal flow of ideas
b)to indicate an approval of the normal flow of ideas
c)to interrupt the pattern of speaking in the normal flow of ideas
d)to create a unusually normal flow of ideas