Question: Five mutually exclusive alternatives are being considered for providing a sewage-treatment facility (STF). The annual equivalent costs and estimated benefits of the alternatives are as follows:
Annual Equivalent (in thousands)
Alternative Cost Benefits
A $1,050 $1,110
B 900 810
C 1,230 1,390
D 1,350 1,500
E 990 1,140
Which plan, if any, should be adopted if the Sewage Authority wishes to invest if, and only if, the B-C ratio is at least 1.0.?