gmat语法问题The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs,namely they vary considerably on a spectrum of genetic relatedness.A.The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs,namely they vary consi

gmat语法问题
The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs,namely they vary considerably on a spectrum of genetic relatedness.
A.The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs,namely they vary considerably
B.That some fraternal twins resemble each other greatly while others look quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs,namely that they vary considerably
C.With some fraternal twins resembling each other greatly and others looking quite dissimilar,it highlights an interesting and often overlooked feature of fraternal-twin pairs,namely considerable variation
D.With some fraternal twins resembling each other greatly and others looking quite dissimilar,it is a fact that highlights an interesting and often overlooked feature of fraternal-twin pairs,namely a considerable variation
E.Because some fraternal twins resemble each other greatly and others look quite dissimilar,this fact highlights an interesting and often overlooked feature of fraternal-twin pairs,namely they vary considerably
为啥是b?d错在哪里?