Harriet beecher stowe's novel uncle tom's cabin affected americans' impressions of southern regional identity by using which of the following strategies? 1. providing a concise legal criticism of the Dred Scott v. Sandford ruling
2. comparing slavery favorably with the lives of poor industrial laborers
3. undermining the idea of slavery as a benevolent institution
4. urging abolitionists to speak up in favor of southern secession