When a historian uses the skill of corroboration ,he or she: a. determine whether a source should be considered primary or secondary b. criticizes a source for being biased toward one point of view c. create a proper citation to acknowledge the sources importance d. confirms information from one source you see several other sources

D. Confirms information from one source you see several other sources

Explanation:

Corroboration is the action of double checking information from one source, and searching for different sources, this is done in several social sciences, like history, sociology, anthroplogy, and in journalism, to chech te veracity of information that we have from a source.

he thoguht he reached india but he reached north america therfor thats why they are known as nactive americans.

- "it was a failure that was an embarrassment for the kennedy administration."

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