Which of the following, if true, most logically completes the reasoning in the passage? Kernland’s government restricts the export of unprocessed cashew nuts in order to ensure a low-cost supply for domestic processing plants. Though the policy constrains farm income and limits the number of farmers who can profitably grow cashews, the government defends it on the grounds that, since the processing plants are in urban areas, removing the restrictions would hurt efforts to reduce urban unemployment. However, the policy may actually have contributed to urban unemployment, since __________. A. a lack of profitable crops is driving many small cashew farmers in Kernland off their land and into the cities B. some of the by-products of cashew processing are used as raw materials by other industries located in Kernland’s cities C. the government does not place similar restrictions on the export of any crop other than cashews D. the income earned by workers in the processing plants is generally greater than that earned by agricultural laborers in rural areas E. without governmental aid in some form, Kernland’s cashew processing plants would not be able to compete for sales in world markets
答案选择A。我想选择B。题目不是说processing plants是在urban么，怎么会导致farmer off land to cities呢？ 另外根据B，如果city的生产by-product的需求多了，unemployment不就上升了么~~
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Technological improvements and reduced equipment costs have made converting solar energy directly into electricity far more cost-efficient in the last decade. However, the threshold of economic viability for solar power (that is, the price per barrel to which oil would have to rise in order for new solar power plants to be more economical than new oil-fired power plants) is unchanged at thirty-five dollars. Which of the following, if true, does most to help explain why the increased cost-efficiency of solar power has not decreased its threshold of economic viability? A. The cost of oil has fallen dramatically. B. The reduction in the cost of solar-power equipment has occurred despite increased raw material costs for that equipment. C. Technological changes have increased the efficiency of oil-fired power plants. D. Most electricity is generated by coal-fired or nuclear, rather than oil-fired, power plants. E. When the price of oil increases, reserves of oil not previously worth exploiting become economically viable.
Many people suffer an allergic reaction to sulfites, including those that are commonly added to wine as preservatives. However, since there are several winemakers producing wine to which no sulfites are added, those who would like to drink wine but are allergic to sulfites can drink these wines without risking an allergic reaction to sulfites. Which of the following, if true, most seriously weakens the argument? A. Sulfites occur naturally in most wine. B. The sulfites that can produce an allergic reaction are also commonly found in beverages other than wine. C. Wines without added sulfites tend to be at least moderately expensive. D. Apart from sulfites, there are other substances commonly present in wine that can trigger allergic reactions. E. Wine without added sulfites sometimes becomes undrinkable even before the wine is sold to consumers.