Answer:
US immigrants created significant numbers of enclaves because of the hostility they faced (not the other way around). In the 1800s, unemployment levels weren't a significant concern relevant to this issue, and overpopulation worries weren't fully realized as a contemporaneous issue.
The answer is. <span>A)It prevented European countries from taking advantage of China's resources.
At that time, China was in a dire state following their war with the Japanese. The open-door policy created by John Hay's was established to make United States able to maintain equal footing to obtain trading relationships with China so it's not fully controlled by the European nations.</span>
