What policy ensured that all nations had equal trading rights with China?

The Open Door Policy was a significant diplomatic stance adopted primarily by the United States in the late 19th and early 20th centuries concerning trade with China. It sought to ensure that all countries would have equal opportunities to trade with China instead of allowing any one nation to dominate the trading market or sphere of influence. The policy was crucial in promoting a level playing field among nations and preventing the partitioning of China by foreign powers.

This approach was born out of the desire to protect American commercial interests in China while also supporting the principle of free trade. The implementation of the Open Door Policy allowed the U.S. to maintain its economic interests without resorting to military intervention or colonization, which had been common during that era.

In contrast, the other policies mentioned — such as the Monroe Doctrine, which focused on preventing European interference in the Americas, Dollar Diplomacy, which aimed to advance U.S. interests abroad through financial investments, and the Good Neighbor Policy, focused on improving relations with Latin American countries — do not directly relate to equal trading rights with China.