题目内容：
According to the text, one factor thatcauses unemployment and earnings figures to over-predict the amount of economic hardship is the__________
A． recurrence of periods of unemploymentfor a group of low wage workers B． fact that unemployment counts do notinclude those who work for low wages
C． establishment of a system of recordkeeping that makes it possible to compile poverty statistics
D． prevalence, among low wage workers andthe unemployed, of members of families in which others are employed
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