题目内容：
根据下面资料，回答 It is well that young men should begin at the beginning and occupy the most subordinate positions. Many of the leading businessmen of Pittsburgh had a serious responsibility thrust upon them at the very threshold of their career. They were intro
A.have the genius of being a future partner B.start at the grassroots and aim high C.work as a sweeper first to be a senior manager D.devote himself entirely to his work
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