C. The best answer I can think of
The correct answer is: C) familiarity with and disdain for the northern industrial workplace.
Secession and, therefore, Civil War were mainly about the right to own slaves. Slaves were, for the Southerns, the most important "material" in the workplace; their region relied on slave-owning in order to do agrarian work.
The Northerns, however, now were in their way to industrialization, where the work at factories was done by employed immigrants and, thus, they were all for abolishing slavery.
<h2>Fredrick Douglass:</h2>
Fredrick Douglass is an American social reformer, abolitionist, orator, writer, and statesman. After he escaped slavery in Maryland, he became a national leader of the abolitionist movement in Massachusetts and New York, gaining note for his oratory and incisive antislavery writings.
<h2>Why is he important?</h2>
When he escaped slavery, he became a prominent activist, writer, and public speaker. He became a leader in the abolitionist movement, which sought to end the practice of slavery, before and during the Civil War. After the conflict and the Emancipation Proclamation of 1862, he continued to push for equality and human rights until his death in 1895.