These lines of poetry from "totally like whatever, you know? " are most likely stated as a question for what purpose?

"invisible question marks and parenthetical (you know? )'s
have been attaching themselves to the ends of our sentences? "

to make fun of the manner of speaking that the writer is criticizing
to show that questions are always appropriate
to emphasize the speaker's confusion
to show that the speaker does not know how to use punctuation