Question

What river runs through the center of hungary, into serbia, and then runs along the border between romania and bulgaria?

Answer 1

The Danube River

Step-by-step explanation:

The Danube has been an important river route for centuries. Known in history as one of the borders of the Roman Empire, the river flows along the borders of ten countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova and Ukraine.