sec10-12,13,14,谢谢！

12.   By a vote of 9 to 0, the Supreme Court awarded the Central Intelligence Agency broad discretionary powers enabling it to withhold from the public the identities of its sources of intelligence information.

(A) enabling it to withhold from the public

(B) for it to withhold from the public

(C) for withholding disclosure to the public of

(D) that enable them to withhold from public disclosure（A）

(E) that they can withhold public disclosure of

13.   As business grows more complex, students majoring in specialized areas like those of finance and marketing have been becoming increasingly successful in the job market.

(A) majoring in specialized areas like those of finance and marketing have been becoming increasingly

(B) who major in such specialized areas as finance and marketing are becoming more and more

(C) who majored in specialized areas such as those of finance and marketing are being increasingly

(D) who major in specialized areas like those of finance and marketing have been becoming more and more（B）

(E) having majored in such specialized areas as finance and marketing are being increasingly

14.   Inuits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the North Pacific and northern Alaska.

(A) in isolation from contact with Europeans longer than

(B) isolated from contact with Europeans longer than

(C) in isolation from contact with Europeans longer than were

(D) isolated from contact with Europeans longer than were（D）

(E) in isolation and without contacts with Europeans longer than

12:这道题答案没有疑问，只是想就此问一下award用法，他后面可以加

that,for,to邓吗？

13：A和B之间两种时态的表达有什么不同的意思吗？

14：C和D中， in isolation 不是更和原文保持一致吗？

不好意思！格式错了！

可是能不能帮我解释一下上面的题！多谢了！