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21 Jul 2025, 02:00
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
88% (01:45) correct
12%
(01:51)
wrong
based on 112
sessions
History
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Time
Result
Not Attempted Yet
The black bear population of the Ursus region has reached critically low levels in recent years, chiefly due to hunting. Black bears vociferously consume the wild truffles that are harvested for commercial purposes by the Ursans, who had hoped that the decline in black bears would increase in the number of truffles they could sell. However, the number of wild truffles in the region has also declined, although the annual number harvested for sale has not increased.
Which of the following, if true, most helps to explain the decline in the number of wild truffles?
A. In the wild, the animal that eats the most truffles are wild hogs, which are also the main prey of the Ursan black bear.
B. In the last several years, Ursus’ truffle harvesters have increased the number of truffle pigs that they use for hunting truffles.
C. The black bear population declining has allowed commercial truffle harvesters to work in some parts of the region that were formerly too dangerous.
D. Many Ursans who hunt black bears do so because of the high market price of bear fur, not because of the threat they pose to truffle hunters.
E. In several surrounding regions through which Ursus’ forests extend, excessive hunting has put the black bear at risk of extinction.
Which of the following, if true, most helps to explain the decline in the number of wild truffles?
A. In the wild, the animal that eats the most truffles are wild hogs, which are also the main prey of the Ursan black bear.
B. In the last several years, Ursus’ truffle harvesters have increased the number of truffle pigs that they use for hunting truffles.
C. The black bear population declining has allowed commercial truffle harvesters to work in some parts of the region that were formerly too dangerous.
D. Many Ursans who hunt black bears do so because of the high market price of bear fur, not because of the threat they pose to truffle hunters.
E. In several surrounding regions through which Ursus’ forests extend, excessive hunting has put the black bear at risk of extinction.
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21 Jul 2025, 02:48
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A. In the wild, the animal that eats the most truffles are wild hogs, which are also the main prey of the Ursan black bear.
Explains: There will be no main predator for these wild hogs and they would continue to pose threat to truffles, this explains why the decline in Ursan black bears didn't cause improvement in truffles.
B. In the last several years, Ursus’ truffle harvesters have increased the number of truffle pigs that they use for hunting truffles.
Doesn't explain: This option doesn't show any clear impact, we cannot make an unwarranted assumption that truffle pigs also pose the threat.
C. The black bear population declining has allowed commercial truffle harvesters to work in some parts of the region that were formerly too dangerous.
Doesn't explain: so what? Just that they work in region formerly too dangerous doesn't explain why the truffle has also declined.
D. Many Ursans who hunt black bears do so because of the high market price of bear fur, not because of the threat they pose to truffle hunters.
Doesn't explain: This explains the reason for hunting of black bears rather than explaining the cause for decline of wild truffles.
E. In several surrounding regions through which Ursus’ forests extend, excessive hunting has put the black bear at risk of extinction.
Doesn't explain: This option doesn't show any clear impact to explain the cause for decline of wild truffles.
Explains: There will be no main predator for these wild hogs and they would continue to pose threat to truffles, this explains why the decline in Ursan black bears didn't cause improvement in truffles.
B. In the last several years, Ursus’ truffle harvesters have increased the number of truffle pigs that they use for hunting truffles.
Doesn't explain: This option doesn't show any clear impact, we cannot make an unwarranted assumption that truffle pigs also pose the threat.
C. The black bear population declining has allowed commercial truffle harvesters to work in some parts of the region that were formerly too dangerous.
Doesn't explain: so what? Just that they work in region formerly too dangerous doesn't explain why the truffle has also declined.
D. Many Ursans who hunt black bears do so because of the high market price of bear fur, not because of the threat they pose to truffle hunters.
Doesn't explain: This explains the reason for hunting of black bears rather than explaining the cause for decline of wild truffles.
E. In several surrounding regions through which Ursus’ forests extend, excessive hunting has put the black bear at risk of extinction.
Doesn't explain: This option doesn't show any clear impact to explain the cause for decline of wild truffles.
24 Jul 2025, 02:30
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Bunuel
Experts' Global Explanation:
Mind-map: Black bear population reached low levels due to hunting à bears consume truffles à decline in bear population expected to increase number of truffles à number of truffles harvested did not increase à number of wild truffles declined
Missing-link: Between bear population declining but the number of truffles harvested not increasing and number of wild truffles declining
Expectation from the correct answer choice: To explain why the number of wild truffles declined despite the bear population declining and despite the number of truffles harvested not increasing
A. Correct. By suggesting that the wild hogs that feed on most truffles are the main prey of the bear, this answer choice indicates that the decline in bear populations likely led to an increase in the population of wild hogs who likely consumed more truffles than before, leading to a decline in truffles population; thus, this answer choice explains why the number of wild truffles declined despite the bear population declining and despite the number of truffles harvested not increasing. Because this answer choice clarifies the exact discrepancy, this answer choice is correct.
B. Trap. If there is an increase in the number of truffle pigs used for hunting truffles, it indicates a likely increase in truffle harvesting activity; however, the argument mentions that the annual number of truffles harvested for sale has not increased, suggesting that even if greater truffle harvesting took place in new areas, the greater activity has no bearing on the argument. Because this answer choice does not explain the discrepancy in the argument, this answer choice is incorrect.
C. Trap. If the decline in bear populations facilitated commercial truffle harvesting in previously dangerous areas, it indicates that commercial truffle harvesting took place in new areas; however, the argument mentions that the annual number of truffles harvested for sale has not increased, suggesting that even if commercial truffle harvesting took place in new areas, the new harvesting activity has no bearing on the argument. Because this answer choice does not explain the discrepancy in the argument, this answer choice is incorrect.
D. Trap. The argument is concerned with why the number of wild truffles declined despite the bear population declining; so, information about the reason for bear hunting is just additional information and does not explain the discrepancy in the argument. Because this answer choice does not explain the discrepancy in the argument, this answer choice is incorrect.
E. The argument is concerned with why the number of wild truffles declined despite the bear population declining; so, whether the decline increases the bear species’ risk of extinction is out of scope and does not explain the discrepancy in the argument. Because this answer choice does not explain the discrepancy in the argument, this answer choice is incorrect.
A is the best choice.
