a double coincidence of wants is required when there is no item in an economy that is widely accepted in…

a double coincidence of wants is required when there is no item in an economy that is widely accepted in exchange for goods and services. is required in an economy that relies on barter. is a hindrance to the allocation of resources when it is required for trade. all of the above are correct.
Answer
Brief Explanations:
In a barter - based economy without a widely - accepted medium of exchange, a double coincidence of wants is necessary. This means both parties in a trade must want what the other has. Also, the need for a double coincidence of wants can impede resource allocation as it makes trade more difficult to arrange.
Answer:
D. All of the above are correct.