Which one of the following industries is best classified as an oligopoly?

If discretionary fiscal policy creates a federal budget deficit, the economy must be experiencing falling output

a. True b. False Indicate whether the statement is true or false

Economists believe:

A. every choice has a sunk cost. B. only some choices have an opportunity cost. C. every choice has an opportunity cost. D. sunk costs are a figment of most people's imagination.