A. If i get this wrong, I'll ask a reaaly simple question to give u back your points
The correct option is SETTING.
In literature, setting refers to the time and place of a particular event in the story. Setting helps to create the background and the mood for the story which the author want to write about. The setting of a story usually have great impacts on the story characters and the event and it also helps the readers to vividly imagine the story.
Joe Shmoe's determination that "What is Pluto" is a credible source is based on the fact that the source is an article from a reputable website. The website is credible because it is backed by a reputable organization, such as the National Science Foundation. The article is also credible because it is written by an expert in the field of astronomy.