Why did the United States formulate the Open Door Policy toward China, ultimately contributing to the Boxer Rebellion?

(1 point)
Responses

to encourage China to develop democratic practices
to encourage China to develop democratic practices

to prevent European nations and Japan from monopolizing Chinese trade
to prevent European nations and Japan from monopolizing Chinese trade

to establish military presence in Asia
to establish military presence in Asia

to support Chinese efforts to industrialize

The correct response is: to prevent European nations and Japan from monopolizing Chinese trade.