A country has a trade surplus when

An appreciation of one's currency means that:

a. the country's exports will become less expensive. b. the country's imports will become more expensive. c. the country's imports will become less expensive. d. it now requires more of this currency in exchange for one unit of another currency. e. it now requires less units of other currencies in exchange for one unit of this currency.

The income distribution in the United States shows that the income share of the top fifth of all families is

a. over 60 percent. b. around 21 percent. c. more than 12 times the income of the bottom fifth. d. less than 10 times the income of the bottom fifth.