Answer :
Final answer:
A primary source document is a firsthand account or original document from a specific time period, such as a letter written by Abraham Lincoln.
Explanation:
Primary sources are firsthand accounts or original documents from the time period being studied. In the case of the letter written by Abraham Lincoln, the aspects that indicate it is a primary source include that it is a handwritten document and the fact that Abraham Lincoln himself wrote it. The date on the letter also contributes to its status as a primary source.
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