題目文章與GWD 13-22相同 不過題目不同 選項也不同 想請問大家的思路
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In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. Female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. Probably, therefore, some substance in the tranquilizer inhibits fertility.
In evaluating the argument, it would be most useful to determine which of the following?
A. Whether there are more collared female rhinoceroses than uncollared female rhinoceroses in the park
B. How the tranquilizer that is used for immobilizing rhinoceroses differs, if at all, from tranquilizers used in working with other large mammals
C. How often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars
D. Whether male rhinoceroses in the wildlife park lose their collars any more often than the park’s female rhinoceroses do
E. Whether radio collars are the only practical means that park rangers have for tracking the movements of rhinoceroses in the park
答案C
本來選B 覺得如果鎮靜劑用在其他大型動物 也會導致生育率降低 就支持了結論
不過仔細看 B選沒有題到生育率
C選 如果使用鎮靜劑的次數非常多 犀牛常常不能動 自然就不能受的 就不是鎮靜劑本身導致生育率低
這樣想對嗎? 因為覺得 沒有比較到 collared和uncollared的犀牛...