A type of personal nonfiction is B. memoir, because it is a type of biography, so it is personal and it is nonfiction, as it describes real events.
An article about current politics (A) is nonfiction but it isn't personal because it describes political events not the story of a specific individual. A yoga instruction book (C) is also nonfiction but it isn't personal either, because it offers instructions about yoga, it isn't a personal narrative. A profile of a foreign country (D) is also nonfiction but has nothing personal in it.
