[求助]GWD11-5

Q5:

A South American bird that forages for winged termites and other small insects while swinging upside down form the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

1. graveteiro belongs to the ovenbird family, a group of New World
                   tropical birds that includes more than 230 species and that are
           
2. graveteiro belongs to the ovenbird family, a group of New World
                   tropical birds that includes more than 230 species and  is
           
3. graveteiro belongs to the ovenbird family, a group of New World
                   tropical birds that include more than 230 species and  is
           
4. graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are
           
5. graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and is
           

答案是B

我不理解的地方在于that不是应该就近修饰birds的么，怎么就修饰到group上去了？

求大家给解答一下，谢谢！