Answer:
b. inflamed passions over sectional differences regarding slavery.
Step-by-step explanation:
Uncle Tom's Cabin by Harriet Beecher Stowe, characterized by its anti-slavery themes, was a highly discussed and controversial book in the 1850s as it highlighted the different stances regarding slavery in the North and the South. Even though the book was banned as abolitionist propaganda in the South, it became a bestseller due to its popularity in the North.
Therefore, the correct answer is b. inflamed passions over sectional differences regarding slavery.