不知道哪里的题？

In the Louisiana Purchase of 1803,the United States acquired 828,000 square miles for about four cents an acre,which more than doubled the country's size and that brought its western border within reach of the Pacific Ocean.
a.In the Louisiana Purchase of 1803,the United States acquired 828,000 square miles for about four cents an acre,which more than doubled the country's size and that brought                     b. With the Louisiana Purchase of 1803,the United States acquired 828,000 square miles for about four cents an acre, more than doubling its size and bringing
c. The United States ,in the Louisiana Purchase of 1803,for about four cents an acre,acquired 828,000 square miles,more than doubling the coutry's size,bringing
答案是b,c为什么不对？bringing 作为伴随结果 b里的bringing好像是修饰miles的？

原文和A和B的答案再check一下，好像打错了。

A的doubling和bringing是平行结构，属主句成分，而且意思合理；B的doubling和bringing，前者是主句成分，后者是附带成分，句子结构发生变化。

我觉得虽然double可以用做动词

但是more than doubling 我真的很少见到

大全里好像没有

我查了一下就是选a是

不是因为b里面s,in......,for........,v......的形式把主语和谓语分的太远拉?

binging是united states的行为还是整个句子的伴随结果呢？如果把doubling和bringing都看成是句子的伴随结果说得通吗