Down at the water plant, there is a proposal for a new filtration system to serve the entire city's needs. The cost of the new system will double water rates. A rational city council should deliberate which following question on behalf of the city's residents?

• Is it worth paying twice as much for the same amount of water?

• Are the total benefits of having a city water supply greater than the total cost?

• Are the benefits of cleaner water greater than the additional costs of the new filtration system?