【求助一道PREP语法139~~谢谢】

水色青空

139. (32262-!-item-!-188;#058&006043)
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



答案选E，我想请问一下这个句子原来的语序是怎样的？。。。。各选项要如何排除？。。。谢谢~

hughlv

正常的语序应该是 the rate at which tree grows is believed to be among the surest indicators of ...

kevin2ff

选e把， among 用的是倒装， 主语是the rate...联系后面as seen来说 前面接the rate at which trees grow比较好。。

水色青空

顶~~