Answer is E. The author is not rejecting a tactic but is in fact advocating one - thus, A and B are out. C and D are wrong because he is recommending the choice of accusing via the term "unyielding" because of the fact that the person cannot deny that he has not yielded. E is thus the conclusion (although it is worded not in the simplest way)
When a group is unable to reach a consensus, group members are often accused of being stubborn, bull-headed, or unyielding. Such epithets often seem abusive, are difficult to prove, and rarely help the group reach a resolution. Those who wish to make such an accusation stick, however, should choose "unyielding," because one can always appeal to the fact that the accused has not yielded; obviously if one acknowledges that a person has not yielded, then one cannot deny that the person is unyielding, at least on this issue.
Which one of the following most accurately describes the argumentative technique employed above?
(A) rejecting a tactic on the grounds that it constitutes an attack on the character of a person and has no substance in fact
(B) rejecting a tactic on the grounds that the tactic makes it virtually impossible for the group to reach a consensus on the issue in question
(C) conditionally advocating a tactic on the grounds that it results in an accusation that is less offensive than the alternatives
(D) conditionally advocating a tactic on the grounds that it results in an argument that would help the group to reach a consensus on the issue in question
(E) conditionally advocating a tactic on the grounds that it results in an argument for which one could not consistently accept the premise but deny the conclusion