Gortland has long been narrowly self-sufficient in both grain and meat. However, as per capita income in Gortland has risen toward the world average, per capita consumption of meat has also risen toward the world average, and it takes several pounds of grain to produce one pound of meat. Therefore, since per capita income continues to rise, whereas domestic grain production will not increase, Gortland will soon have to import either grain or meat or both.
Which of the following is an assumption on which the argument depends?
(A) The total acreage devoted to grain production in Gortland will soon decrease.
(B) Importing either grain or meat will not result in a significantly higher percentage of Gortlanders' incomes being spent on food than is currently the case.
(C) The per capita consumption of meat in Gortland is increasing at roughly the same rate across all income levels.
(D) The per capita income of meat producers in Gortland is rising faster than the per capita income of grain producers.
(E) People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.
问题分析：A说G这个地方grain的面积将很快下降，原文没说，原文只说产量了，没说种植面积问题，杀。B 进口会导致一些结果，文章没说过如果进口会有什么结果，杀。C 说对肉的消费速度增加的是否一样，文章说的事事消费肉，没说过消费肉速度问题，明显是原文事件基础上加东西，错误答案。D 说肉的生产商收入和grain的生产商哪个收入多，显然没说，杀。E 说G这个地方的人消费Grain也会消费肉，原文反复谈的就是消费肉和谷物，信息于原文有联系，留着。
