A double coincidence of wants refers to
A. the situation where two parties are involved in a transaction where money is the medium of exchange.
B. the idea that a barter economy is more efficient than an economy that uses money.
C. the fact that for a barter trade to take place between two​ people, each person must want what the other one has.
D. the situation in which a good that is used as money also has value independent of its use as money.