Really its all of the above, but if its multiple choice and thats not an option I think strikes would be the best answer.
Answer:
in 1865 after the union victory in the Civil War. E) piece by piece during the first hundred years of its operation. c. Ratification of the Constitution
Explanation:
The answer is "<span>connects Central Europe with Western Europe, is used for trade, is used for transportation".
The Danube is the second longest waterway in Europe. It frames a fringe amongst Serbia and Romania before depleting into the Black Sea. The Danube frames a fringe between these two nations Hungary and Slovakia. The Balkan Region most critical stream is Danube.
</span>