The effect of uncle tom's cabin on the nation was toa. spread the message of abolitionism to an enormous new audience.
b. reveal the ugly extent of the vicious slave trade to america. c. ignite such anger in the south that several states soon seceded from the union. d. offer the first written history of american slavery. e. humanize southern slaveholders in the minds of northern readers.

B

Explanation:

Uncle Tom's Cabin is a novel on the topic of anti-slavery, written by Harriet Beecher Stowe. This book is credited with raising concerns with slave trade leading up to the civil war in America.

Before the civil war, many people were in support of slave trade, because they did not know the extent to which the slaves were treated. This book highlights the indecencies slaves had to put up with, and puts emphasis on the need for change. So that slaves can be seen as people, and not as property. Many people are unable to treat others badly if they acknowledge the feeling and humanity of the victim.

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