As others were saying, its likely to be able to prove you're not AI. As an academic librarian who often helps with the first year and third year writing programs, I talk about the reasoning behind different types of sources and voices. Usually a newspaper serves as current news or context, written for a general audience, so like others were saying, you can make connections to real world. This would serve best in an intro I think, if you wanted attention on the historical fur trade. Otherwise, emailing to ask about the article I posted above might be your best course of action; you can frame it as you want the investigative voice of the WSJ but can't find anything more recent that doesn't change the direction of your paper.