Rhetoric the art of effective or persuasive speaking or writing, especially the use of figures of speech and other compositional techniques.
So it would be A
If you have Google docs, go to add-ons and search easy-bib. You put in the site and it gives it back to you in MLA format. If you don't have Google docs, copy and paste this website into your search engine: http://olympus.sandhills.edu/english/wordguide/mlaformat.html
Are there options, I assumed there would be since you used the word "which".
Answer: D, Correct use of formal language.
Explanation: I was correct the first time, when writing an essay using correct use of language is extremley important.
Hope this helped plz mark brainlest