French emperor Napoleon Bonaparte enacts a new legal framework for France known as the Napoleon code
I would go with B. It justified armed rebellion against Great Britain.
The idea of taking over foreign territory
Northerners felt extremely betrayed by the Kansas-Nebraska Act. In fact, many Southerners physically attacked Northerners for their beliefs. Before the Kansas-Nebraska Act, many Northerners didn't have any opinion on slavery, but the act opened their eyes.