How was the collapse of Charlemagne’s empire similar to the fall of the Western Roman Empire?

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:

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

southwest asia

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