详解
Choice B is the best answer. The author states that many major American cities are currently experiencing economic hardship, or "enormous fiscal problems," because of "public pension obligations they incurred in the more prosperous years of the past two decades" (lines 36-39,"America's ...decades"). The author then provides the example of Chicago, a city that can no longer afford to pay the "public services to which most of [its] citizens have grown to feel entitled" (lines 41-43,"enough......entitled"). The author is arguing that many major American cities face economic hardship due to past promises (such as public services) they made to their constituents.
Choices A, C, and D are incorrect because the passage does not discuss expected tax increases, an inner-city tax base, or manufacturing production as they relate to the financial status of many major American cities.