The purpose of your essay is determined by your goal as a writer, as well as your subject matter. There are numerous types of essays, but essays usually fall under one of the following purposes for writing: to inform, persuade, explain or entertain.
It’s either A or D, but I’m pretty sure it’s D
The answer is C. no author was listed.
Regardless of whether the author is credible or important, you always have to give credit where it's due
Yes if it is not your work then it is plagiarism to copy and say you did it. you always want to rephrase your work. (: