What effect did the book uncle Tom’s cabin by Harriet Beecher Stowe, have on the nation eight it convinced, southern nurse to expand slavery. Be convinced it increased the number immigrants, seeking refuge see it convinced northerners that slavery should be outlawed D increased the number of nearest southern rivers.

The correct answer is: "It convinced northerners that slavery should be outlawed."

Uncle Tom's Cabin, written by Harriet Beecher Stowe, had a significant impact on the United States. It was published in 1852 and aimed to expose the cruelty and immorality of slavery. The novel portrayed the lives of enslaved individuals, particularly Uncle Tom, and the harsh realities they faced.

The book had a profound effect on readers, especially in the North. It stirred emotions and awakened sympathy among many people, convincing them that slavery was a moral evil that should be abolished. It helped to fuel the growing abolitionist movement and prompted discussions about the need for change.

Uncle Tom's Cabin did not convince southern slave owners to expand slavery or increase the number of immigrants seeking refuge. Additionally, it did not directly increase the number of northern sympathizers providing aid to escaped slaves along the Underground Railroad (not sure if this is what you meant by "nearest southern rivers" but assumed it meant aid to escaped slaves).