Aggregate demand can be defined as:
A. the total spending by all consumers, business firms, government agencies, and foreigners in the United States.
B. the total amounts that all consumers, business firms, government agencies, and foreigners wish to spend on all final goods and services at various price levels.
C. the total spending by consumers, business firms, government agencies and foreigners at a given price level.
D. the total spending by consumers, business firms, and government agencies on final goods and sevices.