What's the Correct Order? | Choices |
1. (Black Forest) | Germany |
2. (through Vienna) | Bulgaria |
3. (through Bratislava) | Romania |
4. (through Budapest) | Moldova |
5. (through Vukovar) | Croatia |
6. (through Belgrade) | Slovakia |
7. (lower river starts here) | Serbia |
8. (along northern border) | Ukraine |
9. (along southern border) | Austria |
10. (Black Sea) | Hungary |