Economist: Tropicorp, which constantly seeks profitable investment opportunities, has been buying and clearing sections of
tropical forest for cattle ranching, although pastures newly created there become useless for grazing after just a few years.
The company has not gone into rubber tapping, even though greater profits can be made from rubber tapping, which
leaves the forest intact. Thus, some environmentalists conclude that Tropicorp has not acted wholly out of economic self-interest. However, these environmentalists are probably wrong. The initial investment required for a successful rubber-tapping operation is larger than that needed for a cattle ranch. Furthermore, there is a shortage of workers employable in rubber-tapping operations, and finally, taxes are higher on profits from rubber tapping than on profits from cattle ranching.
In the economist’s argument, the two boldfaced portions play which of the following roles?
A. The first supports the conclusion of the economist’s argument; the second calls that conclusion into question.
B. The first states the conclusion of the economist’s argument; the second supports that conclusion.
C. The first supports the environmentalists’ conclusion; the second states that conclusion.
D. The first states the environmentalists’ conclusion; the second states the conclusion of the economist’s argument.
E. Each supports the conclusion of the economist’s argument.
答案是E，但是我做了两次都选了B，我觉得第一句话不应该是conclusion啊。有个even though，应该是个条件吧？？？
还有一个问题，就是我做这种题几号都错，有没有什么好的突破方法啊？？
请牛牛们帮忙啊。先谢过了哈！！！
这道题逻辑还是混乱~希望有人能给予指点！！
谢谢
所有boldface题三步完成
第一步 读全文 找出核心论点（不是中间论点） 读出转折含义（转折后即为核心论点）
第二步 看boldface句同前后句的关系（无转折既是逻辑上的延续） 分清是boldface句为其中某句服务还是某句为boldface句服务
第三步 推出两个boldface句之间的逻辑关系（逻辑要求最高）
请按照这个方法再读原文 如果还有困难请告之
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