求助：GWD20-16-非常想不通--急-请帮忙

1. 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
                       
2. 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
                       
3. 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
                       
4. 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
                       
5. 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

参考答案选B。其实句子前面说有些fraternal twins
                        resemble each other greatly，另外一些others look quite dissimilar，这件事highlights and interesting，到这里为止我都能理解，但是后面的"and often overlooked......"，请为各位能不能告诉我这里的and和谁连接？不会是highlights.... and overlooked....吧？如果这样的话不就有问题了？还是我把句子都理解错了？请大家帮帮忙，谢谢！