What Does the Idea of a Trade-Off Between Inflation and Unemployment

Multiple Choice

What does the idea of a trade-off between inflation and unemployment mean?

A) That lower inflation could be established but only at the cost of higher unemployment
B) That lower unemployment could be achieved but only at the cost of more government spending
C) That lower inflation could be established but only at the cost of lower unemployment
D) That lower unemployment could be achieved but only at the cost of lower inflation rates