单项选择题
A．There is generally less variation among the wages of garment industry workers than among those of auto industry workers.
B．Wage increases in the auto industry have a smaller effect on manufacturers’ total costs than do wage increases in the garment industry.
C．The fringe benefits that auto makers provide for their employees are more comprehensive than are those provided for garment workers.
D．The auto industry faces more competition from companies outside the United States paying low wages than does the garment industry.
E．The auto industry employs a larger total number of workers than does the garment industry.
单项选择题 Currently, the number of first-time admissions of individuals diagnosed as manic-depressives to hospitals in Great Britain exceeds by nine times the number of admissions of such patients to public and private hospitals in the United States, even though the population size of the United States is many times that of Great Britain. Which of the following, if true, would be most useful to an attempt to explain the situation described above ？（）
单项选择题 Regional and local telephone companies around the nation are beginning to offer customers an electronic operator system that allows customers to choose to make some operator-assisted calls through an electronic operator. Nevertheless, the number of human operators on staff will not be reduced in the foreseeable future. Each of the following statements, if true, helps explain why the number of human operators is not being reduced EXCEPT （）.
单项选择题 A new ordinance passed by the Gorenton Council a year ago banned the sale of all nonrecyclable plastic packaging for food being sold in Gorenton. A substantial percentage of Gorenton’s plastic waste, however, is still composed of nonrecyclable plastic food packaging. Which of the following, if true, best contributes to reconciling the apparent discrepancy above ？（）