Federalism has several challenges. what are they?write in point​

Poverty, regional imbalance and unemployment remain Nepal's major problems. The idea of federal structure emerged as a political agenda against unitary system after the success of people's movement in 2006. Like in other federal countries, provinces demand the additional expenditure as they face new challenges.

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane