Open Door Policy of Secretary John Hay aims to keep China a free trade country with equal trade opportunities between countries. At that time, the European country has colonized nearby Hongkong. Thus, the answer is letter C. Open Door policy had kept European Power to limit foreign trade with China.
Between 1800 and 1890 the population increased by 2,428,199 people, so the closest answer to the problem would be 2.5 million people<span>.
Let me know if this is incorrect. Hope this helped! :)
It is completely up to you if you want to give me a brainliest or not :)</span>
C . France
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