求助一道GWD

jiangi1991

In California, a lack of genetic variation in the Argentine ant has allowed the species to spread widely; due to their being so genetically similar to one another, the ants consider all their fellows to be a close relative and thus do not engage in the kind of fierce intercolony struggles that limits the spread of this species in its native Argentina.
due to做定语
A.    due to their being so genetically similar to one another, the ants consider all their fellows to be a close relative and thus do not engage in the kind of fierce intercolony struggles that limits
B.    due to its being so genetically similar the ant considers all its fellows to be a close relative and thus does not engage in the kind of fierce intercolony struggles that limit
C.    because it is so genetically similar, the ant considers all its fellows to be close relatives and thus does not engage in the kind of fierce intercolony struggles that limits
D.    because they are so genetically similar to one another, the ants consider all their fellows to be close relatives and thus do not engage in the kind of fierce intercolony struggles that limit
E.    because of being so genetically similar to one another, the ants consider all their fellows to be a close relative and thus do not engage in the kind of fierce intercolony struggles that limits
C
这题什么情况 怎么选C 啊   limit什么是单数

白菜白菜

这里的limits修饰的是前面逗号后的整个一句话、一件事，不是struggles，如果是修饰struggles，那后面in its native Argentina意思上就不对了，题目的意思是在california这些ant很widely spread，在argentina则相反。同时its也表明前面必须都用单数，所以d也不对
一般Because和due to，because of等短语同时出现，还是Because更好。