Final answer:
Aggregate demand is determined by consumers, firms, the government, and foreigners that buy goods and services produced in the United States.
Step-by-step explanation:
Aggregate demand (AD) refers to the amount of total spending on domestic goods and services in an economy. It includes all four components of demand: consumption, investment, government spending, and net exports (exports minus imports). Therefore, option e. consumers, firms, the government, and foreigners that buy goods and services produced in the United States determine aggregate demand.