One factor that causes unemployment and earnings figures to over-predict the amount of economic hardship is

A. the recurrence of periods of unemployment for a group of low-wage workers.
B. the fact that unemployment counts do not include those who work for low wages.
C. the establishment of a system of record keeping that makes it possible to compile poverty statistics.
D. the prevalence, among low-wage workers and the unemployed, of members of families in which others are employed.