Final answer:
The Kansas-Nebraska Act of 1854 was more favorable to the South as it allowed the residents of the territories to decide on whether to allow slavery or not. It nullified the Missouri Compromise and intensified the sectional divide.
Step-by-step explanation:
The Kansas-Nebraska Act of 1854 was more favorable to the South. Stephen Douglas introduced this bill which proposed the use of popular sovereignty in both territories, allowing the residents to decide whether to allow slavery or not. This act effectively nullified the Missouri Compromise of 1820, which had prohibited slavery above a certain latitude. The act further intensified the sectional divide and led to violence in Kansas as proslavery and Free-Soil forces clashed.