Explanation:

Let’s break it down:

- Medium of exchange: This means you can use money to buy things and pay for services. That’s the basic—and maybe most obvious—role, but it’s not the only one.

- Measure of value: Money lets us put a clear price on products and services, so we know apples cost less than laptops. Without this, trade gets confusing fast.

- Store of value: When you get money today, you can save it and use it later. It holds value over time, so you don’t have to spend it right away.

- All of the above: This is the key point. Money isn’t just one thing; it does all these jobs at once.

So, the correct answer is option 4: All of the above.