What is a correct description of an aggregate demand (AD) curve?
1 )
It is a curve obtained by adding the market demand curves of all consumer goods traded in an economy.
2 )
It is a curve determined by the horizontal summation of all individual consumer demand curves for a product.
3 )
It is a curve that shows the total amount of goods and services firms are willing to buy at a given price in an economy.
It is a curve that shows the total demand of all goods and services produced at all price levels in an economy.
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