XDF section14 Q8

Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.

 (A) Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart

B unlike most warbler species, the gender of the blue-winged warbler is very difficult to distinguish

C unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish

D it is very difficule, unlike in most warbler specied, to tell the male and female blue-winged warbler apart

E blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart

答案是E 为什么呢?C错在哪里了/