The pre-requisite of a barter exchange is A. the double coincidence of needs. B. the identical needs of both sides. C. that one person wants something but has nothing to give up in exchange. D. the double coincidence of money.

countries such as spain, france and portugal colonized the region. although most of latin america was colonized by spain, the countries of portugal and france also had major influences on the region. due to war and disease, native populations were decimated.

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .

answer; the parasympathetic nervous system;