CD－22－15:求助一道语法题，谢谢

CD－22－15

The contractor and the engineer agree on the cause of the bridge failure, but both blame the other.

1. both blame the other
   
           
2. each blames the other
   
           
3. each blame the other person
   
           
4. both are blaming the other
   
           
5. each blames one another

这题答案是啥呢？偶番看了以前的一些讨论贴，说是B，但CD－22给的答案是A，偶自己觉得是E。请指教，谢谢！

请到语法专区去询问,谢谢

It should be B.

A is not correct b/c in this context, the word "other" doesn't have a clear referent.

E is not correct either b/c one another means more than two parties.

谢谢mbz，偶明白鸟。。。

斑斑偶下次会注意的，sorry。。。