单选题 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.

【正确答案】 D

【答案解析】[解析] 文章第一段中就提到：“Among the millions with hourly earnings at or below the minimum wage level，the over—whelming majority are from multiple earner，relatively afflunent families．”[A]说是低收入工人经常性失业。这会引起低估，而不是高估。[B]说失业统计没包括那些低收入的有工作的人。这也是低估的原因。[C]根本未在文中提到。