When government employ cost-benefit analysis to help them decide whether to provide a public good, measuring benefits is difficult because ?

A. there are no benefits to the public since a public good is not excludable
B. the benefits are infinite because a public good is not rival and an infinite amount of people can consume it at the same time
C. one can never place a value on human life or the environment
D. respondents to naires have little incentive to tell the truth.