"in macroeconomics, describes a situation in which two people each want to exchange some good or service that the other can provide. a. a medium of exchange b. a double coincidence of wants c. interrelated banking d. the usefulness of money"

A double coincidence of wants

Explanation: A double coincidence of wants can be defined as a situation in which two person exchange goods with any monetary medium as both have the goods that other wants.

In such a situation, the first individual has the exact same thing that the second wants. In simple words, we can say that it is a barter system exchange.

Hence, from the above calculation we can conclude that option B is correct.

answer; specific performance;