The correct option is C. An editorial from the Charleston Mercury in 1860 is the primary source document that could help a historian understand why the Civil War started.
An editorial from the Charleston Mercury from 1860, which provides factual reports of the historical period, is the primary source document that might aid a historian in understanding how the US Civil War got started.
They were written by individuals who were not present at a historical event. Since correct data can be used to outline events or to compare other sources against, a trustworthy source is undoubtedly highly helpful to historians.
Primary sources are written materials, visual representations, or physical objects that offer firsthand accounts or direct testimony about a historical subject being studied. Original papers produced or encountered at the time of the event under study are considered primary sources.
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