Since the end of communism many balkan nations have a. changed their economies c. attracted foreign investment b. suffered from internal conflict d. all of the above

The Balkan nations are currently capitalist, not communist, so the first statement is correct. Further, they do have internal conflict, for example between the Bosniak and Serbian population in Bosnia. They also attract foreign investment.

So all the options are correct!

Answer(a); // soil salinization and waterlogging;