Memoirs and autobiographies (option "C") are examples of nonfiction literature, since the writer reports on his / her real life events by making use of different literary techniques. Literary nonfiction, also known as creative nonfiction, employs literary elements, like character, setting and plot. The employment of literary styles and techniques in nonfiction narratives are intended to entertain the reader by creating factual narratives about people, places, and events of the real world.
Its true that we don't owe them nothing however if we want to make this world a better place where people live in peace and alongside each other then giving a few pounds to charity or volunteering and helping out the needy can really make a change.