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Biology 8 Online
OpenStudy (anonymous):

Zheng He of China contributed to China's history by: A. Adding to the Great Wall of China. B. Exploration by sea. C. Building the Forbidden City. D. Writing descriptive novels.

OpenStudy (anonymous):

http://en.wikipedia.org/wiki/Zheng_He this is my proof of the answer

OpenStudy (anonymous):

the answer is B

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