求教语法题一道～～～SOS

EchoWong

GWD-9-Q2:

In an attempt to produce premium oysters, a firm in Scotland has developed a prototype of a submersible oyster farm, sitting below the surface of the ocean, and it provides ideal conditions for the mollusks’ growth.

1. farm, sitting below the surface of the ocean, and it provides
   
   
2. farm, sitting below the surface of the ocean for providing
   
   
3. farm that sits below the surface of the ocean and providing
   
   
4. farm that sits below the surface of the ocean and provides
   
   
5. farm that is sitting below the surface of the ocean and it provides
   
   我的问题比较多>_<
   请教各位大侠B选项为何不行，我感觉B和D都可以~~~
   
   

wenchang_yiy

现在分词那个形式如果前面有逗号且位于句中是错误的结构，因为会引起歧义，如果前面有逗号谓语句末可以做主句的结果修饰前面整句话，如果前面没有逗号则修饰之前的名词，这里sitting前面有逗号，出现歧义

这种逗号+分词形式一定要小心，位于句中要第一时间排除掉

EchoWong

谢谢解答，感激