sat writing question

this once common species of frog HAS ALL BUT DISAPPEARED FROM MOST OF THE AREAS WHERE EASE OF FINDING WOULD NORMALLY BE EXPECTED

A) same

B) has all but disappeared from most of the areas where the frog would normally be expected to be found easily

c) has all but disappeared from most of the areas where they would normally and easily be expected to be found

d) has mostly disappeared from areas where the frog would normally be expected as being easily found

e) has mostly disappeared from areas where easy finding of them would normally be expected

i chose c , is it correct ?

© is wrong because the singular pronoun “they” cannot replace the singular antecedent “species of frog.”

It is A. The subject of the sentence is “species” and the highlighted phrase needs to agree with it… In B, “the frog” is wrong because it is not necessarily referring only to the particular species. In C, “they” is wrong because it cannot refer to species which is one of the those collective singular nouns. D has the same problem as B besides having an ending phrase that is ackward. E has the same problem as C besides also having unacceptble phrases like “easy finding.”