What policy allowed all nations to trade with China?

The Open Door Policy was a significant diplomatic principle that aimed to ensure equal trading rights for all nations seeking to do business with China at the turn of the 20th century. Formulated in the late 1890s and officially articulated by U.S. Secretary of State John Hay in 1899, this policy arose in response to the increasing influence and territorial claims of European powers in China, which threatened to limit the access of the United States and other nations to Chinese markets.

By advocating for an Open Door Policy, the U.S. sought to prevent any single nation from monopolizing trade with China and to promote a system of international trade based on equal opportunities. This approach was critical for securing American economic interests in Asia and fostering a cooperative international environment for trade.

The other policies listed address different historical contexts and issues. The Monroe Doctrine primarily dealt with European colonization in the Americas, asserting that the Western Hemisphere was off-limits to new European interventions. The Marshall Plan was a U.S. initiative aimed at aiding post-World War II Europe and does not pertain to trade with China. The Good Neighbor Policy focused on improving relations with Latin American countries and promoting mutual respect and trade, again not relevant to China. Thus, the Open Door Policy