No flaw. If most cities with major shopping malls are regional economic hubs, and your city is constructing a major shopping mall, your city will likely become a major economic hub.

Wrong flaw. Just because most cities that are regional economic hubs generally experience tremendous economic growth at some point, that doesn’t necessarily mean that your city, which is a regional economic hub that hasn’t experienced tremendous economic growth, will eventually experience that kind of growth. It’s entirely possible that your city is an outlier or lacks the necessary conditions to experience that kind of growth. In the stimulus, alternatively, the argument is flawed because of its failure to set parameters around how many living options are available to Lucinda.

Wrong flaw. (C) reasons that since cities that are regional economic hubs have excellent transportation systems, and your city’s transportation system is widely considered inadequate, your city likely won’t become a regional economic hub. (C) errs because just because it’s “widely accepted” that your city’s transportation system is inadequate, that doesn’t necessarily mean it’s true. The wording is ambiguous. The stimulus, alternatively, isn’t flawed because of ambiguous wording.

Wrong flaw. (C) commits a cookie-cutter “hasty generalization” flaw. (D) reasons that because a major shopping mall was built in your city and your city experienced tremendous economic growth afterwards, most cities where major shopping malls are built will also experience tremendous economic growth. (D) draws too broad of a conclusion on the basis of one instance. The stimulus, meanwhile, doesn’t commit a hasty generalization error.

The argument tells us about a single city (”our city” that is having a major shopping mall built in it). It also describes a characteristic of many cities that are regional economic hubs (they contain major shopping malls), and draws a conclusion about the single city (”our city” will likely become a regional economic hub because a major shopping mall is being built in it). This commits the same flaw as the stimulus of failing to set parameters. If 90 percent of cities with major shopping malls become regional economic hubs, it’s likely “our city” will become a regional economic hub. But if, say, only 10 percent of cities with major shopping malls become regional economic hubs, it may not be likely that “our city” will become a regional economic hub.