大全253 请大家帮忙解答

              Dr. Hegsted argues that just as polio vaccine is given to every person to protect the few who might actually contract polio, mass dietary change is needed to protect the significant number who are susceptible to the life-threatening effects of press eating habits.

(A) just as polio vaccine is given to every person to protect the few who might actually contract polio

(B) like polio vaccine, which is given to every person to protect the few who might contract polio

(C) similar to polio vaccine which is given to every person in order to protect the few who might actually contract polio

(D) while, to protect the few who might actually contract polio, polio vaccine is given to every person（A）

(E) similar to the giving of polio vaccine to every person in order to protect the few who might contract polio actually

答案是A，我选B，as不是不适宜放在句首么？like....(B)的错误在哪儿？

大全注释上说：B) B的比较会产生歧义，polio vaccine 也能被 needed to protect the significant number, 错。

我不是很理解，麻烦大家看看~小妹在这儿谢过啦~

谢谢楼上的GG~~~