What is the devolution of catalonia, spain? what r the main issues or reasons related to this region?

(what do they want n why do they want it? are these issues social, cultural, economic, demographic, political, environmental?)

States might choose to cooperate at the regional or global level for all of the following reasons except (2 points) a.) to gain regional political influence b.) to engage in dispute resolution c.) to assure basic human rights d.) to encourage economic interaction e.) to increase national sovereignty