The reaction to Uncle Tom's Cabin demonstrated to Southerners that

A.) Northerners would never tolerate the practice of slavery.

B.) Abolitionists were right to oppose the practice of slavery.

C.) People in other parts of the country did not care about slavery.

D.) Slavery should gradually end so the economy could transition.

(Just found that the answer is A.)

A.) Northerners would never tolerate the practice of slavery.

Explanation:

The South reprimanded the book, particularly supporters of bondage. Numerous individuals composed letters, and some even composed whole books answering the novel.

In the North, the reaction was increasingly fluctuated. Numerous individuals read the work, and it ruled the phase for quite a while. For certain perusers, it solidified their legislative issues and their resistance to slavery. Others figured out how to regard it as a tragedy without getting politically active.

The answer is A. Bc the Northernswould never tolerate that so the slave owners worked harder