PREP一道

96.   (29707-!-item-!-188;#058&003977)

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.

(E) to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving

为什么D比E好？另外有高人解释一下什么时候不能用分词短语结构么。

这道题我也错了，我是这样理解的，不知道对不对。

E 逻辑意思有歧义。serving 可理解成修饰 temperature 造成逻辑意思的改变。

D and 作为连词构成平行结构，使it 指代the number 意思表达清楚。