12. What did the Washington Naval Conference, the Four-Power Treaty, and the Kellogg-Briand Pact have in common? A. They were attempts at promoting world peace without the League of Nations. B. They created secret alliances between the former Allied and Central Powers. C. They were a series of naval disarmament treaties involving the Allied Powers of World War I. D. They were disarmament treaties that limited the number of tanks, use of poison gas, and airplanes.