Q34:
Which of the following, if true, would most weaken the author’s conclusion in lines 25-30?
A. New research reveals that the number of species of birds and parasites that prey on lepidoptera has dropped significantly in recent years.
B. New experiments in which the habitats of lepidoptera are altered in previously untried ways result in the shortening of lepidoptera population cycles.
C. Recent experiments have revealed that the nuclear polyhedrosis virus is present in a number of predators and parasites of lepidoptera.
D. Differences among the habitats of lepidoptera species make it difficult to assess the effects of weather on lepidoptera population cycles.
E. Viral disease is typically observed in a large proportion of the lepidoptera population.
我認為本題答案應是A
，請各位牛牛指教 
作者根據改變棲息地並無減少毛毛蟲數量而主張環境不是主因，<<文因導致無文果>>要weaken
(a)提出其它原因<<天敵減少>>導致無文果
(b)hypathesis(theory)不可有例外，所以就算b成立，文章也己經指出一個毛毛蟲數量不會減少的實驗
