The correct answer is letter D, autobiography. If you cut the word into two, you will have auto and biography. Auto obviously means author. So, autobiography means the author's biography. An autobiography is an account of a person't life written by that same person as well. With is being a non-fiction, it is a true to life story which means that no character is fake and every story he/she tells really happened to his/her life. Also, the characters, setting and events of his/her life in the autobiography is real.