请教LSAT-Set5-SecII-Q22

nobody

22. Public reports by national commissions, governors’ conference, and leadership groups have stressed the great need for better understanding of international affairs by the citizenry. If the country is to remain a leading nation in an era of international competitiveness, the need is undesirable. If there is such a need for the citizenry to have a better understanding of international affairs, then all of our new teachers must be prepared to teach their subject matter with an international orientation.
If all of the statements in the passage are true, which one of the following must also be true?
(A) If the country is to remain a leading nation in an era of international competitiveness, then new teachers must be prepared to teach their subject matter with an international orientation.
(B) If new teachers are prepared to teach their subject matter with an international orientation, then the country will remain a leading nation in an era of international competitiveness.
(C) If there is better understanding of international affairs by the citizenry, then the country will remain a leading nation in an era of international competitiveness.
(D) If the country is to remain a leading nation in an era of international competitiveness, then there is no need for the citizenry to have a better understanding of international affairs.
(E) Public reports from various groups and commissions have stressed the need for a more international orientation in the education of teachers.
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答案A，为何不是D？请大家指教。

shany

记得当时也做错了,hehe。关键是undesirable的理解，如果解释为不可取的，则答案为D,但明显与客观事实不符。后来解释为不乐观的，则A就顺理成章，a-->b, b-->c, 则a-->c.

nobody

谢谢版主解答。