What is the main purpose of this passage? It can be inferred from the passage that the author would disapprove of______.

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问题 What is the main purpose of this passage?
It can be inferred from the passage that the author would disapprove of______.

选项 A、computer-science courses in high schools
B、businessmen and women who use pocket calculators
C、maintenance(维护，保养) checks on computers
D、companies which depend entirely on computers for decision-making