GWD7-21

liuqiangde

请大家帮忙看看，答案是A，我觉A是个标准答案，但是C、E也是取非削弱，请大家帮忙看看，为什么C、E错了，多谢了。
In Teruvia, the quantity of rice produced per year is currently just large enough to satisfy domestic demand.Teruvia’s total rice acreage will not be expanded in the foreseeable future, nor will rice yields per acre increase appreciably.Teruvia’s population, however, will be increasing significantly for years to come.Clearly, therefore, Teruvia will soon have to begin importing rice.


Which of the following is an assumption on which the argument depends?


     A No pronounced trend of decreasing per capita demand for rice is imminent in Teruvia.
    B Not all of the acreage in Teruvia currently planted with rice is well suited to the cultivation of rice.
   C None of the strains of rice grown in Teruvia are exceptionally high-yielding.
    D There are no populated regions in Teruvia in which the population will not increase.
E There are no major crops other than rice for which domestic production and domestic demand are currently in balance in Teruvia.

sdcar2010

Very simple.  C and E are too RESTRICTIVE.  As a rule of thumb, a restrictive statement would not be a necessary assumption.

Plus, if you negate A, the whole argument falls apart.  The same cannot be said when either C or E is negated.

liuqiangde

I see. Thank you sdcar2010, can you help me another problem GWD8-14,
http://forum.chasedream.com/GMAT_CR/thread-539732-1-1.html