In this excerpt from "totally like whatever, you know? " elongated hyphens are most likely used for what purpose? "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

The purpose of the use of elongated hyphens in this excerpt is C. To interrupt the pattern of speaking in the normal flow of ideas.

Elongated hyphens are used to emphasize something, add extra information and even as a substitute for commas in some cases.

The other options are not correct because they don't cover the main function of the elongated hyphens which is to disrupt a sentence with extra information added to it.

glamis thou art, and cawdor; and shalt be what thou art promis'd; yet do i fear thy nature; it is too full o' the milk of human kindness to catch the nearest way: thou wouldst be great; art not without ambition; but without the illness should attend it. what thou wouldst highly, that wouldst thou holily; wouldst not play false, and yet wouldst wrongly win: thou'dst have, great glamis, that which cries, "thus thou must do, if thou have it: and that which rather thou dost fear to do than wishest should be undone." hie thee hither, that i may pour my spirits in thine ear; and chastise with the valor of my tongue all that impedes thee from the golden round, which fate and metaphysical aid doth seem to have thee crown'd withal.  

he lacks ambition.  

he is hesitant.  

he lacks courage.  

he has moral scruples.

it is the : d because is true