People are forced to make choices because of

The rate at which Sam is willing to give up a gallon of gasoline to get one more pound of coffee, and remain on the same indifference curve is called his

A) opportunity cost of coffee. B) opportunity cost of gasoline. C) personal price of coffee. D) marginal rate of substitution.

Under a "crawling peg" system, a country's exchange rate

A) is fixed except for small, surprise changes. B) changes at a predetermined rate against the dollar or some other major currency. C) can fluctuate within a narrow band. D) can change, but the changes are kept secret from the public. E) is determined by the central bank of another country.