Question

why did violence occur in kansas after the passage of the kansas - nebraska act?
plantation owners were outraged that slavery had been outlawed in the territories.
people in the territories were angry that a new political party had been established.
many americans disagreed with the supreme court decision to limit slavery in the territories.
opposing forces clashed because they disagreed about popular sovereignty and slavery.

Explanation:

The Kansas - Nebraska Act allowed the territories of Kansas and Nebraska to decide on slavery through popular sovereignty. This led to a conflict between pro - slavery and anti - slavery forces as they tried to influence the outcome. Opposing sides clashed over the issue of slavery and the concept of popular sovereignty.

Answer:

D. Opposing forces clashed because they disagreed about popular sovereignty and slavery.