（A） It was sometimes higher than 15 percent.

　　（B） It has been analyzed seriously only since the early 1970's.

　　（C） It can be calculated more easily than can unemployment frequency.

　　（D） It was never as high as the rate during the 1870's.

　　（E） It has been shown by Keyssar to be lower than previously thought.

　　6. According to the passage， Keyssar considers which of the following to be among the important predictors of the likelihood that a particular person would be unemployed in late nineteenth-century Massachusetts？

　　Ⅰ。 They person's class

　　Ⅱ。 Where the person lived or worked

　　Ⅲ。 The person's age

　　（A） Ⅰonly

　　（B） Ⅱonly

　　（C） Ⅰand Ⅱonly

　　（D） Ⅰand Ⅲonly

　　（E） Ⅰ，Ⅱ，and Ⅲ

　　7. The author views Keyssar's study with

　　（A） impatient disapproval

　　（B） wary concern

　　（C） polite skepticism

　　（D） scrupulous neutrality

　　（E） qualified admiration

　　8. Which of the following， if ture， would most strongly support Keyssar's findings as they are descrebed by the author？

　　（A） Boston， Massachusetts， and Quincy， Massachusetts， adjoining communities， had a higher rate of unemployment for working-class people in 1870 than in 1890.

　　（B） White-collar professionlars such as attorneys had as much trouble as day laborers in maintaining a steady level of employment throughout the period 1870-1920.

　　（C） Working-class women living in Cambridge， Massachusetts， were more likely than working-class men living in Cambridge to be unemployed for some period of time during the year 1873.

　　（D） In the 1890's shoe-factory workers moved away in large numbers from Chelmsford， Massachusetts， where shoe factories wew being replaced by other industries， to adjoining West Chelmsford， where the shoe industry floutished.

　　（E） In the late nineteenth century， workers of all classes in Massachusetts were more likely than workers of all classes in other staates to move their place of residence from one location to another within the state.