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
白勇的語(yǔ)法書里經(jīng)常提到,不能改變句子原來(lái)的意思.但是難道C選項(xiàng)沒(méi)有改變么?
（原句意思是說(shuō),As many as,or more than 250,改了之后,直接就是more than）