The correct answer to this open question is the following.
Although the question is incomplete because it does not provide any menu to see the options, we can say the following.
Different sources are aimed at different audiences. Sometimes a source can be directed at more than a single group of people. Documentary films are usually aimed at the general population across the globe. Some sources may have a very specific audience. A literary journal can be specifically aimed at students or scholars with a background in literature.
It all depends on the kind of audience or reader. It is very important that the author defines its audience and then try to collect the kind of correct source to support the information the author is about to share.
Many times documentaries are aimed at general audiences in order to create some kind of awareness about an issue. But in the case of a literary or scientific journal can be specifically aimed at students, researchers, or scholars with a background in those subjects. It is a specialized publication.
