As many office workers adapt to remote work, cities may undergo fundamental change if offices remain under-utilized. Who will benefit if working from home becomes the norm?

        Employers argue they make considerable savings on real estate when workers shift from office to home work. However, these savings result from passing costs on to workers.

       Unless employees are fully compensated, this could become a variant of parasitic (寄生的) capitalism, whereby corporate profits increasingly rely on extracting value from the public—and now personal—realm, rather than on generating new value.

        Though employers are backed by a chorus of remote work advocates, others note the loneliness, reduced productivity and inefficiencies of extended remote work.

        If working from home becomes permanent, employees will have to dedicate part of their private space to work. This requires purchasing desks, chairs and office equipment.

       It also means having private space dedicated to work: the space must be heated, cleaned, maintained and paid for. That depends on many things, but for purposes of illustration, I have run some estimates for Montréal. The exercise is simple but important, since it brings these costs out of the realm of speculation into the realm of meaningful discussion.

        Rough calculations show that the savings made by employers when their staff works from home are of similar value to the compensation workers should receive for setting up offices at home.

       What does this mean for offices in cities? One of two things may happen: Employers pass these costs onto employees. This would be a form of expropriation (侵占), with employees absorbing production costs that have traditionally been paid by the employer. This represents a considerable transfer of value from employees to employers.

        When employees are properly compensated, employer’s real estate savings will be modest. If savings are modest, then the many advantages of working in offices—such as lively atmosphere, rapidity of communication, team-building and acclimatization (适应环境) of new employees—will encourage employers to shelve the idea of remote work and, like Yahoo in 2013, encourage employees to work most of the time from corporate office space.

解析：A。根据题干中的estimates for Montréal可定位至原文第六段第二、三句。这两句指出，作者为了便于说明，以蒙特利尔为例进行了一些估算，这项工作虽然简单，但很重要，因为它将这些成本从臆测领域带到了有意义的讨论领域。由此可知，作者对蒙特利尔进行估算是为了脱离臆测，使讨论有意义，A项与此内容相符，故正确。

错项排除：B项的利用第六段第二句的illustrate进行干扰，但working patterns在文章中无依据，故排除。文章第四段中虽然提到远程工作对生产力的影响，但这是反对远程工作人士的观点，并非作者对蒙特利尔进行估算的原因，故C项错误。D项的affects the economy在文中无依据，故排除。