Magazine Publisher: 
Our magazine does not have a liberal bias.  It is true that when a book review we had
commissioned last year turned out to express distinctly conservative views, we
did not publish it until we had also obtained a second review that took a
strongly liberal position.  Clearly,
however, our actions demonstrate not a bias in favor of liberal views but
rather a commitment to a balanced presentation of diverse opinions.

Determining which of the following would be most useful
in evaluating the cogency of the magazine publisher’s response?

A.      
Whether any other magazines in which the book was
reviewed carried more than one review of the book

B.       
Whether the magazine publishes unsolicited book reviews
as well as those that it has commissioned

C.      
Whether in
the event that a first review commissioned by the magazine takes a clearly
liberal position the magazine would make any efforts to obtain further reviews

D.      
Whether the book that was the subject of the two reviews
was itself written from a clearly conservative or a clearly liberal point of
view

E.       
Whether most of the readers of the magazine regularly
read the book reviews that the magazine publishes

题目说没有对于liberal的 bias而是各种观点的平衡

证据：包含保守观念的REVIEW，直到有了另一份LIBERAL版本之后才发布。

C 选项是不是说，看第一个保守的review是否对liberal有一个正确的position，而不至于影响接下来后面写的review（综述）

感觉对这个句子的结构不太明了，拿出来讨论一下。