Which statement gives the correct description of an aggregate demand (AD) curve?
- AIt is a curve obtained by adding the market demand curves of all consumer goods traded in an economy.
- BIt is a curve determined by the horizontal summation of all individual consumer demand curves for a product.
- CIt is a curve that shows the total amount of goods and services firms are willing to buy at a given price in an economy.
- DIt is a curve that shows the total demand of all goods and services produced at all price levels in an economy.