Question

what did the open door policy do?
monopolized the trade of the country, allowing no other country the ability to do so
stopped the europeans from controlling trade in china and allowed all nations to practice free - trade in china
forced chinese nationals to assimilate to american culture and allow american missionaries into the country
stopped china from owning a navy or military

Explanation:

The Open - Door Policy was a statement of principles initiated by the United States in 1899 and 1900. It aimed to keep China open to trade with all countries on an equal basis, thus preventing any one country from monopolizing trade in China. It supported the idea of free trade in China and opposed any one power (like the European powers or Japan) from controlling trade there.

Answer:

B. Stopped the Europeans from controlling trade in China and allowed all nations to practice free trade in China