His reflection. To call a man a beast, one must see through his heart.
Elizabeth should ask, "Which traits show Theseus's heroism?" using a current article from a scholarly website for research. A scholarly website is a more reliable source of information than a newspaper article published in 1990 that most likely didn't have anything to do with this subject.
The answer to fill in the blank would be B) Thesis statement because the thesis is like the message the author is trying to send to his readers so they can comprehend his or her text.