Oedipus the King Expository essay method

Students will have to write five papers, each of which must be about 1,000 words long, or about two-and-a-half typed pages. The papers should follow the expository method and should analyze a literary work with the intention of proving a thesis about the work. Each paper should contain quotations from two sources other than the work under discussion, and each paper should have a works cited page which will not count as one of the required pages.

I would like the topic to be about how Oedipus was coerced into murdering, but it was not his fault because he was groomed. If there is a better topic i am open to that as well. 

I cannot afford to be caught  plagiarizing consdering I have never used this site before. Thank you all for offering this.