题目内容：

一道GRE填空题,求教
Literature is inevitably a ________ rather than _________ medium for the simple reason that writers interpose their own vision between the reader and reality.
　　(A) distorting...a neutral
　　(B) transparent...an opaque
　　(C) colorful...a drab
　　(D) flawless...an inexact
　　(E) flexible...a rigid
答案选的A,
但是我觉得E也可以啊,前半句就可以翻译为：文学必然是一种灵活而非死板的媒体
为什么不对?