A research paper is fact and nothing but the fact. A research paper is just giving information about a topic. However, rhetorical questions are used to persuade the reader to believe or agree with something, mainly in a discursive essay; but in a research paper, you aren't persuading, you are educating.
Answer:
United: brought together, Divided: Brought apart
Explanation:
United means to for a group of something to be brought together. Divded means for a group of something that was once united to be broken up.