Before about 1500
c. e., which sea-based system of exchange was the largest in the world?

c. bounced back and forth from worthless to worth a lot and back to worthless

could you use this to with a topic?

the key difference between a democracy and a republic lies in the limits placed on government by the law, which has implications for minority rights. both forms of government tend to use a representational system — i.e., citizens vote to elect politicians to represent their interests and form the government.