Cerrato: Economists argue both that the higher turnover rate of part-time workers shows them to be much more likely to be dissatisfied with their jobs than full-time workers are and that lower-paid, part-time workers threaten to take jobs from full-time employees. But because job efficiency is positively correlated with job satisfaction, companies are unlikely to replace satisfied employees with dissatisfied ones. Therefore, ________.
Which one of the following most logically completes Cerrato's argument?Cerrato accepts, for the sake of argument, that part-time workers are more likely to be dissatisfied. He then adds that satisfaction is linked to efficiency, and companies are unlikely to replace satisfied workers with dissatisfied ones.
So his conclusion should reject the idea that dissatisfied part-time workers seriously threaten full-time workers’ jobs.
(A) full-time workers are likely to lose jobs to part-time workers
This is the opposite of Cerrato’s reasoning. He argues that companies are unlikely to replace satisfied full-time workers with dissatisfied part-time workers.
(B) the companies earning the greatest profits tend to be those that pay their workers the highest wages
This is unsupported. The argument discusses job satisfaction, efficiency, and replacement of workers, not company profits or wage levels generally.
(C) dissatisfied part-time workers are unlikely to threaten the jobs of full-time workers
This is correct. If dissatisfied workers tend to be less efficient, and companies are unlikely to replace satisfied employees with dissatisfied ones, then dissatisfied part-time workers are unlikely to be a serious threat to full-time workers’ jobs.
(D) the higher turnover rate of part-time workers is only partly caused by their greater job dissatisfaction
This is unsupported. Cerrato does not explain what causes the higher turnover rate.
(E) companies generally hire part-time workers only when they are unable to hire full-time ones
This is unsupported. The argument does not discuss when companies choose to hire part-time workers.
Answer: (C)