The function of money known as "Medium of exchange" describes a money use in the buying & selling of goods and services.
Money serves as a medium of exchange because it is use as intermediary instrument used to facilitate the sale, purchase, or trade of goods between parties.
In today world , the medium of exchange is money and it is used in the buying & selling of goods and services.
Therefore, the Option C is correct.
Read more about medium of exchange
brainly.com/question/20147958
#SPJ1