阅读下面短文，掌握其大意，然后从各题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　It is well that young men should begin at the beginning and occupy the least important positions．　　1　　 of the leading businessmen of Pittsburgh had a serious responsibility placed upon them at the very 　　2　　 of their career．They were 　　3　　 to the broom(扫帚), spending the first hours of their business lives 　　4　　 the office．

　　And here is the basic 　　5　　 of success, the great secret：　　6　　 your energy, thought, and capital(资本)wholly on the business in which you are 　　7　　．Having begun in one line, determine to fight it out on that 　　8　　, to lead in it, adopt every 　　9　　, have the best machinery, and know the most about it．

　　The companies which fail are those which have 　　10　　 their capital, which means that they have scattered their brains 　　11　　．They have investments in this, or that, or 　　12　　, here, there, and everywhere．“Don't put all your eggs in one basket” is all 　　13　　 , I tell you．“Put all your eggs in one basket, and then 　　14　　 that basket”．Look round you and take 　　15　　; men who do that do not often fail．It is easy to watch and carry the one basket．It is trying to carry too many baskets 　　16　　 breaks most eggs in this country．He who 　　17　　 three baskets must put one on his 　　18　　, which is likely to fall down．One 　　19　　 of the American businessman is lack of concentration．

　　Remember：put all your eggs in one basket, and watch that basket．　　20　　 Emerson says, "no one can cheat you out of final success but yourselves．"

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