og13 115 介词短语问题跪求大神~

mmmmmignon

Because there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulatedinternational disputes over uninhabited islands.

• ABecause there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulated  
• BBecause the new maritime code provides that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, it has already stimulated
• CEven tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, already stimulating  
• DBecause even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, this has already stimulated  
• EBecause even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, which is already stimulating  
• 其他的语法点都知道错误了~ 就是有三点想不通：
• 1.under provisions of the new maritime code这个介词短语是不是本来作状语修饰整句话的？
• 2.状语一般放在句首加逗号而不放在句中是不是avoid像这道题这样有修饰邻近名词的嫌疑？
• 3.介词短语如果在一句话中是不是修饰最近的名词？有夹心修饰的歧义吗？
• 求大神~NN~先在这里谢过了！！