An expository prose and essentially non fiction. More of a text written with the goal of explaining, informing or even enlightening its readers of an issue. Similar to a descriptive prose but it aims at exposing an event as something of concern or value.
All of these answer could very well be an expository prose but if not, I believe your best bet is "A. a magazine article." In my opinion.
Hopefully, my description of what it is will help you decide!
