Answer:
The correct answer is C. If aggregate demand and aggregate supply intersect on the vertical potential GDP curve; this indicates that the economy is at full employment.
Step-by-step explanation:
Full employment indicates the condition in which all those who want a job have access to all the hours of work they need with "fair wages". As people change jobs, full employment means a stable unemployment rate around 1.2% of the total workforce, but does not allow for underemployment where part-time workers cannot find the hours they need to live with dignity.
In macroeconomics, full employment is sometimes defined as the level of employment at which there is no cyclical unemployment or low demand unemployment.
Full employment raises the levels of both supply, since there is full occupation of the providers of goods and services; and demand, since society in general has more money to spend on goods and services.