When oligopolists take into account their competitors' behavior, this situation is called:

Refer to the diagram. Which tax system has the least built-in stability?

A.  T 4 .
B.  T 3 .
C.  T 2 .
D.  T 1 .

What is the total demand for goods and services in an entire economy called?

A. supply and demand B. aggregate demand C. consumer demand D. GDP demand