2.  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) For about four cents an acre the United States acquired, in the Louisiana Purchase of 1803, 828,000 square miles, more than doubling the country's size and it brought
(C) With the Louisiana Purchase in 1803, the United States acquired 828,000 square miles for about four cents an acre, more than doubling its size and bringing
(D) The United States, in the Louisiana Purchase of 1803, for about four cents an acre, acquired 828,000 square miles, more than doubling the country's size, bringing
(E) Acquiring 828,000 square miles in the Louisiana Purchase of 1803, the United States bought it for about four cents an acre, more than doubling the country's size and bringing  

正确选项是C， E中说acquire与bought同时用，表达不简洁。（不理解）C比E好在哪呢？

是啊,acquire以及bought都是获得的意思
干嘛一句句子要用两个~
with用作状语表方式,凭着....的手段

个人觉得，E的问题是
1. acquiring与bought在此处意思差不多，都是购得的概念。
2. bought it里的it指代不太清楚，语法上，要么指代miles, 要么指代purchase， 因为前半句里的louisiana是个定语。但it既无法指代前面的828,000 （复数），也无法指代purchase (逻辑意思不对）

C中的it是否有指代不明的问题呢，逻辑上当然是指代US，但是会不会是acre?

(C) With the Louisiana Purchase in 1803, the United States acquired 828,000 square miles for about four cents an acre, more than doubling its size and bringing
介词短语表方式+主句+伴随（doubling and bringing两个动名词）

(E) Acquiring 828,000 square miles in the Louisiana Purchase of 1803, the United States bought it for about four cents an acre, more than doubling the country's size and bringing  
前半句动名词表伴随，it 如果要指代的话，就指代成了这个动名词短语，不合逻辑。
整句话的结构是 动名词伴随+主句+动名词伴随

个人认为相对而言还是C通顺一点吧。