GMAT逻辑题目:

　　【逻辑】

　　Plant scientists have usedgenetic engineering on seeds to produce crop plants that are highly resistantto insect damage. Unfortunately, the plants requiremore fertilizer and water to grow well than normal ones do, and the seeds themselves are quite expensive,and for most farmers the savings on pesticides would not compensate for thehigher seed costs and the cost of additional fertilizer. However, sinceconsumer demand for grains, fruits, and vegetables grown without the use ofpesticides continues to rise, the use of genetically engineered seeds of thiskind is likely to become widespread.

　　Inthe argument given, the two portions in boldfaceplay which of the following roles?

　　A. The first presents adevelopment that the argument seeks to show will have certain disadvantages;the second is introduced as a consideration likely to offset one of thosedisadvantages.

　　B. The first presents adevelopment that the argument predicts will have a certain impact; the secondacknowledges a consideration that weighs against that prediction.

　　C. The first supplies a contextfor the argument; the second is a part of the evidence presented as support forthe argument's conclusion.

　　D. The first is evidence providedto support an intermediate conclusion that is drawn in support of theargument’s main conclusion; the second is that intermediate conclusion.

　　E. The first and the second eachprovide evidence in support of the argument’s main conclusion.

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