Question

Which of the following best defines "medium of exchange"?

A. something with a fixed value that we use for exchange
B. a way to determine what is the best deal
C. the average value exchange of a single good or service
D. a monetary rate that stays constant

Answer 1

I find the first option best.

B. even if something is a best deal - we might not be able to get it, so exchange might not even take place.
C. this would not be a "medium"
D. - well, there isn't such a rate, is there?

So, answer A is really the best - and I think it's also a good definiton

Answer 2

The best sentence to define "medium of exchange" is:

A. something with a fixed value that we use for exchange

Step-by-step explanation:

The medium of exchange is the concept to name the tool we use as a medium to exchange different products with the intention o reaching an objective agreement. To achieve this, the medium of exchange has to have a general value and even when its value can increase or decrease based on the economical conditions of the environment it is adaptative and will always behave in a proportional ratio.