Winchester Township cannot afford to keep its several small branch libraries supplied with a wide selection of current books.
Evidence
If the branch libraries were closed, then Winchester could afford to open one large library.
The large library could carry broader and more current selections [books].
Conclusion
Winchester would better meet its residents’ needs by closing its small branch libraries and opening one larger, well-supplied library.
Evaluate
The conclusion makes a recommendation about building a new library. It does this by introducing a new concept of better meeting residents' needs. A couple of assumptions are required to reach this conclusion.
First, the argument assumes that one large library would better meet residents' needs than several smaller ones. We can easily envision a situation where it's convenient for residents to visit the branch libraries that are close to their neighborhoods, while a single main library would be farther away and therefore less accessible.
The argument also assumes that a broader and more current selection of books would better meet residents' needs. But people use libraries for many reasons other than borrowing books. Libraries often have computers, study rooms, and meeting rooms that residents can use. Libraries often offer classes and events. And people are likely to borrow older books from libraries, not just current ones.
Goal
A correct answer is likely to focus on one of these unintended consequences of closing branch libraries and having one large library, a consequence which would prevent one large library from serving residents better than the existing branch libraries.