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

Question

(1 point)
Responses

to encourage China to develop democratic practices
to encourage China to develop democratic practices - no response given

to prevent European nations and Japan from monopolizing Chinese trade
to prevent European nations and Japan from monopolizing Chinese trade - no response given

to establish military presence in Asia
to establish military presence in Asia - incorrect

to support Chinese efforts to industrialize

Answer 1

to support Chinese efforts to industrialize - no response given