题目内容
（请给出正确答案）
[主观题]
According to the passage, what results from the introduction of computers？A．After re-train
According to the passage, what results from the introduction of computers？
A．After re-training, all employees in the firm get new jobs.
B．A considerable proportion of people are employed in key posts.
C．The firm keeps all of its original staff members.
D．The decrease in staff members may be balanced by the increase of firm activities.
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