请看下面的新GRE阅读短文练习。
Factory workers in Beltania are guaranteed lifetime jobs, bonuses paid on thebasis of productivity and corporate profits, and a wage rate that is not attachedto a particular job. Paradoxically, these guarantees do not discourage factoryowners from introducing labor-saving machinery. Such innovations are to theactory owners' advantage despite the fact that the owners must protect thewages of their workers.
Which of the following, if true, most helps to explain why the introduction of labor-saving machinery is advantageous to factory owners?
A Before a Beltanian factory worker is hired, he or she must present a recordof his or her previous productivity.
B Labor-saving machinery increases productivity, thus yielding profits thatmore than cover the cost of retraining workers for other jobs.
C The purchase and maintenance of new machinery adds significantly to thefinal cost of the goods produced.
D Factory workers demand a change of procedure in the routine tasks they perform.
E Limited competition exists among Beltanian factories for consumer markets.
答案：B
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