There is no possibility of further widening of the European Union

Which of the following would increase the GDP of the United States?

a. A resident of California buys a case of wine from a winery in France. b. A resident of Germany buys a software program from a company in Washington. c. A resident of Florida spends $3,000 on a vacation in Mexico. d. A Japanese investor purchases 100 shares of a computer company located in Illinois.

Suppose that Sam likes pears twice as much as apples, meaning that he is always indifferent between consuming one pear or two apples. Sam's indifference curves for pears and apples are

a. right angles. b. bowed inward. c. bowed outward. d. downward-sloping straight lines.