Legal immigration to the United States peaked just before World War I, but today is almost zero

In the above figure, point ________ shows an equal distribution of income, while point ________ shows an unequal distribution of income

A) a, b B) b, c C) b, a D) a, d

Barriers to trade

A) include government policies such as tariffs and quotas. B) have been falling with technological improvements in transportation and communication. C) have risen since World War II as many countries have imposed higher tariffs. D) Two of the above are true.