Suppose You Attend a Town Meeting at Which Some Experts

Suppose you attend a town meeting at which some experts tell the audience that they have performed a cost-benefit analysis of a proposed transit system that would probably reduce overall air pollution and fossil fuel consumption.The analysis,however,reveals that ticket prices will not cover the cost of operating the system when fuel,wages,and equipment are taken into account.As a biologist,you know that if ecosystem services had been included in the analysis,the experts might have arrived at a different answer.Why are ecosystem services rarely included in economic analyses?

A) People take them for granted because we generally do not pay for them.
B) They are not worth much and would not greatly change the cost-benefit analysis.
C) There are too many variables to include in ecosystem services,making their calculation impossible.
D) Ecosystem services take into account only abiotic factors that affect local environments.