GMAT培训 每日一题-逻辑第47题

Certain genetically modified strains of maize produce a powerful natural insecticide. The insecticide occurs throughout the plant, including its pollen. Maize pollen is dispersed by the wind and frequently blows onto milkweed plants that grow near maize fields.

Caterpillars of monarch butterflies feed exclusively on milkweed leaves. When these caterpillars are fed milkweed leaves dusted with pollen from modified maize plants, they die. Therefore, by using genetically modified maize, farmers put monarch butterflies at risk

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether the natural insecticide is as effective against maize-eating insects as commercial insecticides typically used on maize are 

(B) Whether the pollen of genetically modified maize contains as much insecticide as other parts of these plants

(C) Whether monarch butterfly caterpillars are actively feeding during the part of the growing season when maize is releasing pollen 

(D)  Whether insects that feed on genetically modified maize plants are likely to be killed by insecticide from the plant's pollen

(E) Whether any maize-eating insects compete with monarch caterpillars for the leaves of milkweed plants growing near maize fields

题目分析：评价原文：一种植物到处飘，飘到另外一个植物上，蝴蝶吃了这个植物，死了，所以中这种植物会威胁蝴蝶。A说天然杀虫剂和人工杀虫剂哪个杀虫更有效，跑题了。B说这种植物和其他植物包含的杀虫剂量差不多，没提，杀。C说那得看看蝴蝶在这种植物到处飘的时候是否是觅食的时候，探讨的就是原文的point，留着。D围绕的是吃了这种植物的昆虫谈的，谈的是原文的那个蝴蝶吗？范围没交集，杀。E说别的昆虫和蝴蝶抢着吃叶子，跑的更远了，杀。