as many as, or more than为什么错了？

Rachel76

请教牛牛们：
Organized in 1966 by the Fish and Wildlife Service, the Breeding Bird Survey uses annual roadside counts along established routes for monitoring of population changes of as many as, or of more than 250 bird species, including 180 songbirds.



(A) for monitoring of population changes of as many as, or of

(B) to monitor population changes of as many, or

(C) to monitor changes in the populations of

(D) that monitors population changes of

(E) that monitors changes in populations of as many as, or

我选了E..但是答案是C。是因为E的as many as, or more than 错了么？我怎么记得xdf老师说过这个结构的啊。。
求解答~~

Rachel76

懂了！！谢谢~~

mycontrol01

that monitors
单复数错

silent7706

E)中that指代有问题。在这里指代的是"routes"不符合逻辑。

recoupsin

没错，但是这题的考点是use sth to do。