Why did the united states establish the open door policy?
to ensure that it could conduct trade with and exert influence in china to encourage immigration from china and other asian countries to allow us missionaries to travel freely in other countries to secure a lasting peace among the various imperial powers

The correct answer is A) To ensure that it could conduct trade with and exert influence in China.

The Open Door Policy was introduced by America during the late 19th and early 20th centuries. During this time, America and many European countries (Spain, France, Britain, Portugal, etc.) were fighting for control of land and resources. With this in mind, the United States wanted to make sure that they did not get cut off from trading with China. Due to fear of control of China by another country, the US came up with this Open Door policy in hopes that all countries could have a beneficial trade relationship with China during this time.

wheres the poem i cant need more info