4. Pyramids were built as tombs for the pharaohs and their queens.
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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>
