Why did nationalism rise in many of the regions that were part of Napoleon’s empire?

A.
People had been oppressed under previous rulers and attributed their new freedom to France.

B.
People in these conquered regions did not have strong cultures before and embraced French identity.

C.
People resented being conquered and wanted to reclaim the ways of their original cultures.

D.
People feared being overtaken by powers in the East and developed a desire to unify against those powers.