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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:

c

the articles of confederation placed most of the power on the feds

the tallest building in the western hemisphere and the sixth tallest building in the world

these civilizations were located around fertile rivers, where they could produce an abundance of crops