一道阅读问题

bluealicea

题目：The passage suggests which of the following about the workers who took temporary jobs during the 1980s?

A. They did not necessarily prefer temporary employment to permanent employment.
这是从原文这里分析出来的 "Given the analyses, which reveal that growth in temporary employment now far exceeds the level explainable by recent workforce entry rates of groups said to prefer temporary jobs, firms should be discouraged from creating excessive numbers of temporary positions. "
为什么原文这里没有拿temporary job和permanent job比较，但是选项却有这个比较？


我原来选B. Their pay declined during the decade in comparison with the pay of permanent employees.我是看到讨价还价能力Another factor is labor’s reduced bargaining strength, which allows employers more control over the terms of employment. 还有第二段后面给的建议Government policymakers should consider mandating benefit coverage for temporary employees, promoting pay equity between temporary and permanent workers.选了B

附上原文
Some observers have attributed the dramatic growth in temporary employment that occurred in the United States during the 1980s to increased participation in the workforce by certain groups, such as first-time or reentering workers, who supposedly prefer such arrangements. However, statistical analyses reveal that demographic changes in the workforce did not correlate with variations in the total number of temporary workers. Instead, these analyses suggest that factors affecting employers account for the rise in temporary employment. One factor is product demand: temporary employment is favored by employers who are adapting to fluctuating demand for products while at the same time seeking to reduce overall labor costs. Another factor is labor’s reduced bargaining strength, which allows employers more control over the terms of employment. Given the analyses, which reveal that growth in temporary employment now far exceeds the level explainable by recent workforce entry rates of groups said to prefer temporary jobs, firms should be discouraged from creating excessive numbers of temporary positions. Government policymakers should consider mandating benefit coverage for temporary employees, promoting pay equity between temporary and permanent workers, assisting labor unions in organizing temporary workers, and encouraging firms to assign temporary jobs primarily to employees who explicitly indicate that preference.