Which of the Following Best Defines the Term Aggregate Output

Which of the following best defines the term aggregate output?

A) The total quantity and quality of goods and services that a country's citizens can purchase with the currency used in their economic system
B) The measure of economic growth that compares how much a system produces with the resources needed to produce it
C) The pattern of short-term ups and downs in an economy
D) The total quantity of goods and services produced by an economic system during a given period
E) The conditions of the economic system in which an organization operates