How did the Mongol empire build upon or transform the societies and relationships that prevailed before the Mongol movement? In what ways did Mongol rule stimulate the changes that emerged following the Mongol movement?

sorry don't know

Explanation:

I answered just to get free points

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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:

i think u are supposed to write a long-essay answers to the long-essay questions