Which term refers to the standard tool used to facilitate trade and measure value?

• A. Mediums of exchange
• B. Monetary Policy
• C. Monopoly
• D. Monotheism

Answer: (A)

Money serves as the standard tool that makes buying and selling easier by acting as a commonly accepted medium of exchange. It lets people swap goods and services without needing a direct barter arrangement, and it provides a common unit of account to measure how much things are worth. It can also store value for future purchases. In this context, the term that best captures that role is mediums of exchange, since it names money’s function in facilitating trade and measuring value. The other terms don’t fit: monetary policy is about controlling the money supply and interest rates, monopoly is a market structure describing one seller, and monotheism is a religious belief.