The correct answer is "the universal topic". Universal topics are non specific themes which can be the main focus of an essay for example, "food", "animals", "friendship", "love", among other. Nonfictional works could be focused of any universal topic, and the author's purpose by writing the work is to elaborate in this topic with her or his readers.
The correct answer to this question is "<span>the universal topic.</span>" I'm pretty certain it is C, the universal topic, since that is usually what is gained through reading a work of non-fiction, unlike a fiction where only the main facts are present, with/without a universal topic.
