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Organized in 1966 by the Fish and Wildlife Service,the Breed

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Organized in 1966 by the Fish and Wildlife Service,the Breeding Bird Survey uses annual roadside counts along established routes ________________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
D.that monitors changes in populations of as many as,or
白勇的语法书里经常提到,不能改变句子原来的意思.但是难道C选项没有改变么?
(原句意思是说,As many as,or more than 250,改了之后,直接就是more than)
你说的原则的确是有,在这个题里面,因为其他的都错,C最好,而且你说的那个原则比较多的用在,一些位置调换,省略了副词或者情态动词的错误选项里