The most important medium of exchange before 19th century was ?

currency

The best example of a medium of exchange is currency and the whole purpose of it is to facilitate trading activities. By providing an element that has a known and collectively-agreed value of exchange the medium of exchange becomes a generally accepted way to settle economic transactions.

Explanation:

explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: