求助prep03

3.    (24557-!-item-!-188;#058&001027)

Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as southern Texas.

(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then

请问答案为什么是Ａ不是Ｂ

b的话，变成了their descendants... release...  African honeybees 的逻辑了，不合理

明白了。。。傻了。。。赫赫。。。原来这么简单。。。谢谢了。。。