City College’s board wants to minimize the college’s expenditures on physical facilities over time and so has asked the physical facilities department to consider choosing double-pane windows when replacing old windows. Compared to single-pane windows, double-pane windows provide much more insulation to a building, thus reducing energy costs. Moreover, the labor and other costs associated with installing double-pane windows are the same as those for single-pane windows.
Which of the following would it be most useful to know in determining whether switching to double-paned windows would be likely to help minimize City College’s physical facilities expenditures?
【选项】
Whether the company from which CIty College buys single pane windows also sells double pane windows
选项是否正确？