The right answer is " C. Understanding the historical context of a 19th-century women's rights poster"
The explanation for this story is that the historian must always seek to understand the historical context of his sources, be they primary or secondary, so that his research is correct and accredited.
In such an aspect, the historian must be constantly and regularly looking for sources that enable his contact with the experiences that have already been consummated over time. Apart from this type of action, historical research is subject to the production of assumptions and judgments that escape the historian's commitment to give voice to the time he observes and researches.