Multiple choice How did the United States' Open Door Policy shape the economic future of China? It prevented European nations from opening trade is Japan and China it created competition with American markets in Japan It allowed all nations to trade with China it allowed the Chinese to immigrate to the U.S Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Open Door Policy, proposed by the United States in 1899, was designed to ensure that all nations had equal access to trade with China, preventing any single power from monopolizing Chinese markets.