Urban planner: When a city loses population due to migration, property taxes in that city tend to rise. This is because there are then fewer residents paying to maintain an infrastructure that was designed to support more people. Rising property taxes, in turn, drive more residents away, compounding the problem. Since the city of Stonebridge is starting to lose population, the city government should ttherefore refrain from raising property taxes. Which of the following, if true, would most weaken the urban planner's argument? ['Demographers project that the population of a region that includes Stonebridge will start to increase substantially within the next several years.', 'Stonebridge at present benefits from grants provided by the national government to help maintain certain parts of its infrastructure.', 'If Stonebridge does not raise taxes on its residents to maintain its infrastructure, the city will become much less attractive to live in as that infrastructure decays.', 'If there is a small increase in property taxes in Stonebridge and a slightly larger proportion of total revenue than at present is allocated to infrastructure maintenance, the funding will be adequate for that purpose.']