Could someone please explain this?

In the second paragraph, the author describes why the use of “deconstruction” is telling — it shows that the critics who use such a term are approaching literature mechanically, like a construction working, as if they’re trying to tear down texts to reveal flaws. This supports the author’s conclusion from the first paragraph: the “contemporary school of literary criticism” use words to describe their approach approach that betray the assumptions underlying their approach. The first paragraph uses words as an example of this point — ”signify” and “signifier.” The second paragarph uses “deconstruction” as another example of that point. Therefore, (C) is correct.