The descriptions that best characterize the information Lars found would be:
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Credible sources - The materials from the British government’s National Archives and documents from curators and historians are likely to be trustworthy and reliable.
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Primary sources - The letters from American soldiers are primary sources, as they are firsthand accounts from individuals who experienced the events of the war.
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Reasoned judgment - The background information provided by historians and curators likely includes their analyses and interpretations of the events of World War I, which would involve reasoned judgment.
Thus, the three options are:
- credible sources
- primary sources
- reasoned judgment