The aggregate is a) a type of economic system b)the total number of goods demanded or supplied c) a form of revenue d)the total profit made on sales.

Correct answer choice is :

The total level of demand for wanted goods and services that makes up the gross national product. Aggregate interest is the sum of expenditure, investment expenditure, government expenditure, and net commodities. Aggregate performance relates to economy-wide amounts of individual behavior.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

answer; knowledge,reason,and judgement;