The correct answer is "point of view." An author's interpretation of a fact shows their perspective or viewpoint on the subject matter. To arrive at this answer, we can break down the question and look for the keywords. "Author's interpretation" suggests that we are talking about how an author perceives or understands a fact. The word "show" indicates that the interpretation is being expressed or demonstrated. By considering these clues, we can determine that the author's interpretation of a fact reveals their point of view.
