The rise and fall of fads will affect the equilibrium price and quantity for example if water was in short supply then the price will more than likely go up. Hope this helps!
I'd think that one advantage of nationalism is the unity it builds among people who share the same nation, who start to think of each other as co-citizens.
One disadvantage of nationalism is the hate can be directed against outsiders.
I believe its B but i might be wrong IDK
