[求助]CRCRCR 請大大幫幫忙>"<

vely301

There has been a sharp increase in the subscription prices of many professional and scholarly journals in the past seven years. Many publishers ascribe the necessity for these increases to the easy availability of photocopying facilities, which enable people simply to copy the articles they want rather than buying the journal.
Which of the following, if it is true, would make this explanation more plausible?

A) The great majority of professional and scholarly journals have a massive backlog of papers awaiting publication.

B) Over the past five years there has been a substantial decline in the number of individual subscriptions to professional and scholarly journals, while library subscriptions have remained fairly stable.

C) In the five years immediately preceding the price surge, there was a substantial decline in the number of individual subscriptions to professional and scholarly journals, while library subscriptions remained fairly stable.

D) Many libraries have recently begun cutting back on subscriptions to professional and scholarly journals.

E) In almost every field, several new professional and scholarly journals have begun publication in the past few years.

想請問一下  這題的答案是C

不過不過  我看B和C實在是看不出甚麼明堂

煩請NN幫忙解答^^

Lily0515

B\C明显有别

B选: while前面表述过去五年来在professional and scholarly journals上有相当大的下降与文章开头第一句明显相左

C:表示一旦professional and scholarly journals的价格增加造成销售量decline;而library subscriptions remained fairly stable.->确实帮助解释necessity for these increases to the easy availability of photocopying facilities

请指教

vely301

嗯嗯嗯  B了解了

不過C還是>"<

唉  我資質駑鈍  請大大說白一點>"<

謝謝了

Lily0515

我不是大大, 只是玩票性质而已

找explain photocopying的技术普及

EX.原文书非常贵, 所以当价格sharp increase后, 穷学生可能会向图书馆借阅再copy的方式
        或向朋友借书copy

请指教