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题库 / Prep2012-CR-28
Mall owner: Our mall's occupancy rate is so low that we are barely making a profit. We cannot raise rents because of an unacceptably high risk of losing established tenants. On the other hand, a mall that is fully occupied costs about as much to run as one in which a rental space here and a rental space there stands empty. Clearly, therefore, to increase profits we must sign up new tenants.
Which of the following, if true, most seriously weakens the argument?
The mall's operating costs could be cut by consolidating currently rented spaces in such a way that an entire wing of the mall could be closed up.
The mall is located in a geographic area in which costs incurred for air-conditioning in the hot summers exceed those incurred for heating in the mid winters by a wide margin.
The mall's occupancy rate, though relatively low, has been relatively stable for several years.
The mall lost tenants as a result of each of the two major rent increases that have occurred there.
None of the mall's established tenants is likely to need additional floor space there in the foreseeable future.
因为经营一个几乎全满的商场的成本（fully occupied costs）和经营一个比较空的商场成本一样。所以为了赚取利润必须签新的租客进来。问weaken
⚠️最后结论中提到了must 该题的目的在于削弱方案的唯一性：【must】 sign up new tenants.
choice a, 商场的运营成本（operating costs）可以通过整合现有租客（consolidating currently rented spaces）的方式来降低。（√）提出了另一个方案，削弱了方案的唯一性✅
choice e, 没有一个现有的租客在可见的未来需要额外的楼层空间。（×）增强
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