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­+1 for Option D

A: No. It is about deer which is a wild animal. Not relevant
B: No. Black bears are not relevant
C: No. Just a generalized statement

D: Correct. The opposition's claim is based on wolves' reputation for killing humans. No recorded killing of humans by wolves could only mean that their claim was based on a false reputation

E: No. Strengthens opposition's claim
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IMO D

Conclusion:-the conservation group wants to dispel the myth that the wolf is a vicious killer.

Only option weaken the conclusion that wolf had never killed anyone in last 500yrs.

(D) There has never been a documented case of a wolf killing a human in the 500-year recorded history of North America.
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­A conservation group is trying to convince Americans that the return of gray wolves to the northern United States is a positive development. Introduction of the wolf faces significant opposition because of the wolf’s reputation as a killer of people and livestock. So that the wolf will be more acceptable to average Americans, the conservation group wants to dispel the myth that the wolf is a vicious killer.

Which of the following, if true, would most weaken the opposition’s claim?

(A) Wolves are necessary for a healthy population of white-tailed deer because wolves kill the weaker animals and limit the population to sustainable numbers.
(B) In a confrontation, black bears are much more dangerous to humans than wolves are.
(C) Wolves are superb hunters, operating in packs to track down their prey and kill it.
(D) There has never been a documented case of a wolf killing a human in the 500-year recorded history of North America.
(E) Wolves occasionally take livestock because domestic animals are not equipped to protect themselves the way wild animals are.
­


OFFICIAL EXPLANATION:



D. This critical reasoning question asks you to weaken the opposition’s statement that the wolf is vicious, so look for a statement that shows that the wolf isn’t a danger to people or livestock. Begin by eliminating answers that don’t address the appropriate conclusion. Choice (A) deals with the beneficial impact of wolves on the ecosystem but doesn’t talk about their propensity toward viciousness to humans or livestock, so eliminate it. You can also eliminate Choice (C) because the hunting prowess of the wolf isn’t the issue, and this choice may actually strengthen the contention that wolves are dangerous. Choice (E) also doesn’t weaken the conclusion in question; it argues that wolves may threaten livestock. This leaves you with Choices (B) and (D). Choice (B) compares the danger posed by wolves with the danger posed by black bears. Even if a wolf is less dangerous than a bear, that doesn’t mean a wolf isn’t dangerous. The best answer is Choice (D), because it provides a statistic that weakens the opposition’s argument that wolves are dangerous to humans.­
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