Of the three big questions, what, how, and for whom, which of the fol-lowing is an example of a how question?

A. Why do doctors and lawyers earn high incomes?
B. Why don't we produce more small cars and fewer gas guzzlers?
C. Why do we use machines rather than migrant workers to pick grapes?
D. Why do college football coaches earn more than professors?


C Answer C describes how grapes are picked.
4 Which of the following is not a key idea in the economic way of thinking?
A. People make rational choices by comparing costs and benefits.
B. Poor people are discriminated against and should be treated more fairly.
C. A rational choice is made at the margin.
D. Choices respond to incentives.
B Answer B is not part of description of the economic way of thinking on page 8.

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