[求助]明天考试 还有一题语法不会 跪求解答

prep里面的

45.   (26816-!-item-!-188;#058&003335)

A recent poll indicates that many people in the United States hold a combination of conservative and liberal political views; i.e., they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting many specific government programs for health care, education, and the environment.

(A) they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting

(B) they denounce big government--they say that government is doing too much and has become too powerful--but supporting at the same time

(C) they denounce big government, they say that government is doing too much and it has become too powerful, while they support at the same time

(D) while they denounce big government, saying that government is doing too much and has become too powerful, at the same time supporting

(E) while they are denouncing big government--they say that government is doing too much and it has become too powerful-- supporting at the same time

为什么选A 谢谢 本人只能勉强排除最后两个答案 但是剩下三个怎么判断 中间有and 可是看不出是什么平行 时态也很奇怪 希望大家帮助 感激不尽

B 中  denounce和but suporting不平行

C中  it 多余 they say that 与they denounce 也不平行

A 最好咯

明天加油

B 中  denounce和but suporting不平行

C中  it 多余 they say that 与they denounce 也不平行

A 最好咯

明天加油

刚才还问了别人 还有逗号不能连接句子 恩 我都没想起来