Final answer:
The main goal of the U.S.'s Open Door policy was to promote equal trading rights in China for all foreign nations. It aimed to maintain peace and economic prosperity by allowing free access to Chinese markets for all nations.
Step-by-step explanation:
The main goal of the U.S.'s Open Door policy was to promote equal trading rights in China for all foreign nations. In 1900, the U.S. secretary of state, John Hay, urged several nations to sign a treaty with the Chinese government that established the Open Door policy. This policy ensured that all countries could trade with China on the same terms, preventing any one nation from gaining an advantage over others. It aimed to maintain peace and economic prosperity by allowing free access to Chinese markets for all nations.
Learn more about U.S.'s Open Door policy