9. Why did the Nanjing Treaty between Britain and China worry Japan so much? He fears that... a) Britain and other European countries decide to invade their country since they are so close.
b) China was now going to force Japan to do more trade with them.
c) Britain fails to come and trade with them.
d) Britain was going to force Japan to join China.

I think the answer is:

B) China was now going to force Japan to do more trade with them

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: