Answer:
1
Explanation:
The rest are wrong b/c it helped <em>expand</em> China rather than isolate it, they didn't use ships on the Silk Road, and it brought better communications, etc. between countries.
History is an impact value
Is nonrenewable
Forms from organic remains
Releases carbon dioxide when burned
<em>I believe the answer is </em><em></em><em>C</em><em>: 1829
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