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Not long ago, the brown tree snake was inadvertently introduced, via a cargo ship hailing from Papua New Guinea, into the jungles of Guam. In this new environment, the tree snake became an apex predator and began to threaten the local bird populations, particularly that of the white-throated ground dove. To help track the tree snake’s spread, wildlife agencies have informed local bird watching societies of the danger posed by the brown tree snake and asked them to report any tree snakes they saw.

Which of the following, if true, would provide most support for the prediction that the agencies’ action will have its intended effect?

A. Most recreational bird watchers in Guam are interested in the preservation of the white-throated ground dove because it is a rare bird, whose sightings are highly prized.
B. Tree snakes generally hunt nocturnally, but most recreational bird watchers in Guam practice their hobby during the day.
C. The brown tree snake has an aggressive nature that makes it unattractive as prey.
D. The tree snake is one of the multiple nonnative species on Guam that threaten the survival of white-throated ground dove populations there.
E. The bird calls that most people use when trying to spot a white-throated ground dove on Guam do not attract the tree snake.

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Please find the response below:

Argument Summary

This effort is due to the fact that the invasive brown tree snake has decimated native bird life in Guam.


For this plan to be effective, the bird watchers must be encouraged, aware of the threat, and cognitively prepared to report any sighting.


Why (A) Supports the Prediction


(A) says bird watchers take an interest in preserving the white-throated ground dove because of its rarity and value.


If they value protecting this bird, they will be motivated to watch for and report the snake threatening it, making the agencies’ plan work.
It directly strengthens the success of reporting.


Why the Other Options are Incorrect


(B) reasons that watchers are only active during the day, while snakes’ hunting activities take place at night, weakening their effectiveness.
(C) It is irrelevant that the snake is not prey.
(D) Other threats have no influence on reporting behavior.
(E) The fact that bird calls do not attract snakes is irrelevant.


Core Logic
The plan works in case watchers are motivated to report.


Only (A) is strongly motivated


ExpertsGlobal5
Not long ago, the brown tree snake was inadvertently introduced, via a cargo ship hailing from Papua New Guinea, into the jungles of Guam. In this new environment, the tree snake became an apex predator and began to threaten the local bird populations, particularly that of the white-throated ground dove. To help track the tree snake’s spread, wildlife agencies have informed local bird watching societies of the danger posed by the brown tree snake and asked them to report any tree snakes they saw.

Which of the following, if true, would provide most support for the prediction that the agencies’ action will have its intended effect?

A. Most recreational bird watchers in Guam are interested in the preservation of the white-throated ground dove because it is a rare bird, whose sightings are highly prized.
B. Tree snakes generally hunt nocturnally, but most recreational bird watchers in Guam practice their hobby during the day.
C. The brown tree snake has an aggressive nature that makes it unattractive as prey.
D. The tree snake is one of the multiple nonnative species on Guam that threaten the survival of white-throated ground dove populations there.
E. The bird calls that most people use when trying to spot a white-throated ground dove on Guam do not attract the tree snake.


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