Why Is Simply Asking People How Much They Value a Highway

Multiple Choice

Why is simply asking people how much they value a highway not a reliable way of measuring the benefits and costs

A) Those who stand to gain have an incentive to tell the truth.
B) Those who stand to lose have an incentive to exaggerate their true costs.
C) Answers to the survey questions relating to cost will always be downwardly biased.
D) Not everyone asked will be using the highway.