老prep SC 求解释！ 为什么语法笔记后面的题目和破解版里面的内容不对呢？？

ZPPGMAT

139.(32262-!-item-!-188;#058&006043) 为什么选E呢？？

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

(A) On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow

(B) On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth

(C) On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles

(D) Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate

(E) Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow

ZPPGMAT

为什么on earth 修饰整句可排除呀?

四叶草clover

on earth修饰整句排除ABC
D无谓语排除

四叶草clover

全倒装句子