黑脸题大破解（5）

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GWD3-Q16:

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?

1. The first supports the
        conclusion of the economist’s argument; the second calls that conclusion
        into question.
2. The first states the
        conclusion of the economist’s argument; the second supports that
        conclusion.
3. The first supports the
        environmentalists’ conclusion; the second states that conclusion.
4. The first states the
        environmentalists’ conclusion; the second states the conclusion of the
        economist’s argument.
5. Each supports the
        conclusion of the economist’s argument.

1）
                作者：economist

2）
                结论：these
environmentalists are probably wrong.

3）
                逻辑图：该公司一直追逐利益不管长久利益改林为牧地——》但是该公司并没有进入rubber tapping，尽管利润丰厚且不损害林子——》所以，环境保护者说该公司不完全出于利润目的——》但是，我们经济学家认为环境者错——》因为，rubber-tapping 对该公司来说经济上不划算。

4）
                联系：二者因果论证关系，因为thus链接。

5）
                C