Why might people most likely say that democracy in eastern europe came at a price

They were able to achieve democracy but there was a price.  It was always a smooth transition. Some had to deal with the new environment of democracy and had to make adjustments.  In some cases, old ethnic conflicts flared into full-scale wars that killed many people in the process.  Some are still trying to escape the influence of their former masters.  

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.

the answer is:

c. economic output