Two sites for suspension bridges are under consideration for crossing the Allegheny River in Pittsburgh, PA. Use the B/C ratio method at a discount rate of 6% per year to determine which bridge, if either, should be built Site N Site S Initial Cost, $ 11 106 27 106 Annual M&O, $/year 100,000 90,000 Benefits, $/year 990,000 2,100,000 Disbenefits, $/year 120,000 300,000 Life, years