NEED HELP NOW!!!!! WILL GIVE BRAINIEST IF CORRECT!!!!

How has the building of dams created problems for countries rivers in Southwest Asia.


a.Dams are too expensive to build to be practical.


b.Dams limit the water available to countries further downstream.


c.Few countries have the technology needed to be able to build dams.


d.Countries in SW Asia are not allowed to build dams along shared rivers.