三个Prep中的语法的问题，哪些牛人来解释一下啊

戴小真

OG10-171. In 1527 King Henry VIII sought to have his marriage to Queen Catherine annulled so as to marry Anne Boleyn.
(A)    so as to marry
(B)    and so could be married to
(C)    to be married to
(D)    so that he could marry
(E)    in order that he would marry
Key  为啥A不行呢？

According to surveys by the National Institute on Drug Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey.
(A) doubling those reported in the 1977 survey
(B) to double the number the 1977 survey reported
(C) twice those the 1977 survey reported
(D) twice as much as those reported in the 1977 survey
(E) twice the number reported in the 1977 survey
这个题目麻烦给分析一下各个选项吧。谢谢