Works-of-moral-philosophy-such-as-Plato’s-Republic-or-Aristotle’s-Nicomachean-Ethics-are-partly-concerned-with-how-to-live-a-morally-good-life-But-philosopher-Jonathan-Barnes-argues-that-works-that-present-a-method-of-living-such-a-life-without-also-

D. It provides a characterization about a field of thought by noting two works in it and then details a way in which some works in that field are more comprehensive than others.