Final answer:
The Open Door Policy helped the U.S. economy by ensuring American companies could continue trading with China, promoting equal access to China's markets.
Step-by-step explanation:
The Open Door Policy had a positive impact on the U.S. economy because it ensured that American companies could continue to trade with China. This policy aimed to promote equal access to China's markets for all countries, preventing any one nation from dominating trade in China. By allowing American businesses to participate in the Chinese market, the Open Door Policy increased trade opportunities and economic growth for the U.S.
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