Answer:
The correct answer is option b.
Explanation:
Aggregate demand can be calculated as the sum of consumption expenditure, investment expenditure, government expenditure and, net exports.
The consumption expenditure shows the demand for goods and services by households. The investment expenditure represents quantity of goods and services demanded by firms.
The government expenditure represents the demand for goods and services by the government and net exports show the quantity of goods and services demanded by customers from abroad.
So, option b will be the right answer.