Barter is
a. another name for money.
b. an exchange of goods and services directly for goods and services.
c. the main system of exchange in the united states today.
d. the basis for economic specialization.

The correct answer is option B.

Explanation:

A barter system is an economic system characterized by exchange of goods and services directly for goods and services.  

Barter system does not use money as a medium of exchange. Goods and services are used in place of money. The value of a good or service is expressed in terms of other good or service.  

Double coincidence of wants is an important concept in the barter system.

B. an exchange of goods and services directly for goods and services.

Explanation:

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